LightSpec Issue 3

Issue 3 / May 2011

Case HoffmeisterMinimum energy costs, maximum light comfort in NRW parliament assembly chamber.

Fortimo LED DLM The next generation GEN 3.

WSP LightingDaylight controlled office lighting and motorized blinds can save electricity for both lighting and cooling.

Welcome to the digital LightSpec! LightSpec online is the interactive version of LightSpec magazine. It offers an inspired view in the international world of Lighting technology, applications, exciting innovations and talented personalities. There you will find movies, interviews, links to relevant websites, the link to the LEDs in general lighting LinkedIn group and much more.

Browse the digital magazine and be inspired!

www.philips.com/lightspec

INTRo & CoNTENT

Issue 3 / May 2011

Case HoffmeisterMinimum energy costs, maximum light comfort in NRW parliament assembly chamber.

Fortimo LED DLMThe next generation GEN 3

WSP LightingDaylight controlled office lighting and motorized blinds can save electricity for both lighting and cooling.

1887_00_060_MAG_210x297.indd 1 5/3/11 12:37 PM

10

Times are changing fast. That is a statement we would never have associated with the lighting world a few years ago. A conservative, stable, traditional industry, still using many light sources developed before most of us were born. An industry slow to embrace change and accept new technology breakthroughs. And then that all changed overnight. LEDs have propelled the lighting industry into a new era, the fast moving semi conductors’ era.

Two years ago the lighting market was still getting used to the new phenomena of LED modules as a light source. Compact fluorescent lamps, halogen and incandescent were yesterday’s technology and the first victims of the LED revolution. Even then back in 2009, in my European seminars, I confidently referred to the fact that it would take some time yet before LEDs would reach the performance of fluorescent lamps. “Focus on office lighting”

04. LED MASTERCLASS on-LinE

DiSCuSSion

06. ThE LED WAvE

08. nEW TuBE, WhAT nExT foR

fLuoRESCEnT?

10. T5 oR noT T5, ThAT iS ThE QuESTion

12. hoT vS CoLD

14. SpoTLighT on offiCES30 2012

And yet, with LED energy efficiency upgrades matching and following a curve predicted several years ago, I am almost stunned by the speed at which we have reached energy efficiencies of 100 lm/W and higher. It is the main topic now in LinkedIn and Internet discussion sites; how does LED technology compare to fluorescent?

In this edition of LightSpec we look at the inroads LEDs are making into the fluorescent lighting arena from different angles. What do specifiers and oEMs think? What about the products themselves - LED luminaires for offices, LED tubes versus T5, the new LED Strip modules? What is happening within the Zhaga consortium and what is the view of heat sink manufacturers? It all makes for interesting reading and helps build a clearer picture.

After shops, hotels, leisure and outdoor, even the traditional office can now be lit with LED products that will not underperform compared to T5 solutions…

Times are indeed changing fast.

Annetta KelsoSenior Marketing Manager, Philips oEM Lighting solutions EMEA

CoNTENT 16. TAKE 3, Q&A

18. LED LighTing WiLL iMpRovE ThE offiCE SpACE

20. hoffMEiSTER DoWnLighTS WiTh phiLipS

foRTiMo LED DLM TEChnoLogy

22. gooDByE fLuoRESCEnT, hELLo LED

24. ThE BiggEST ChALLEngES

25. TAKE LighTing To A WhoLE nEW DiMEnSion

26. ThE “DigiTAL LighT ERA” hAS DAWnED

28. ZhAgA SETS nEW STAnDARD in

LED LighT EnginES

30. foRTiMo LED DLM, ThE nExT gEnERATion gEn 3

32. STAnD-ALonE LighTing ConTRoLS

34. LED ThE fuTuRE of offiCE LighTing

36. CLiCK ovER To LighTSpEC onLinE

38. BRing ThE ouTDooRS, inDooRS

foRTiMo LED LLM foR inDooR LighTing

39. TALK To ThE ExpERTSwww.philips.com/lightspec

The latest in Lighting Technology

www.philips.com/luminous

International Lighting magazine

www.philips.com/lightspecINTRo & CoNTENT

Linear fluorescent luminairesLinear fluorescent luminaires are still the best solution for offices.

28 Comments 19 agree /9 disagree

Too glaryLEDs are too glary for use in offices


Efficiency T5 luminairesT5 luminaires are still more efficient than LEDs


Fluorescent lampsFluorescent lamps are easier to control than LEDs




T5/T8 fluorescent luminairesI prefer to use T5/T8 fluorescent luminaires for office lighting




Too expensiveLEDs are still too expensive for office lighting




Reduction dimmingI need dimming down to 1% and LEDs can not do this yet.

27 Comments 6 agree /21 disagreeFluorescent lampsFluorescent lamps are easier to control than LEDs






Reduction dimmingI need dimming down to 1% and LEDs can not do this yet.














Replacement fluorescent by LED luminairesThere are not many LED luminaires yet that can replace Fluorescent

22 Comments 16 agree /6disagree

Shapes of luminairesI want to see new shapes of luminaires for office lighting




Variable white colour controlI would like to see LED luminaires with variable white colour control in offices


LED tubesI would relamp an existing office luminaire with LED tubes







22 Comments 16 agree /6disagreeShapes of luminairesI want to see new shapes of luminaires for office lighting











20 Comments 5 agree /15 disagreeVariable white colour controlI would like to see LED luminaires with variable white colour control in offices











30 Comments 7 agree /23 disagreeReduction dimmingI need dimming down to 1% and LEDs can not do this yet.



22 Comments 16 agree /6disagree







Variable white colour controlI would like to see LED luminaires with variable white colour control in offices


LED technology is ready to take on fluorescent!Yes it is a bold statement and it is up for discussion. Fluorescent lighting has been with us for longer than most people can remember today. It is steady, solid and reliable, offers high energy efficiency and good quality functional lighting. You can’t go far wrong with a fluorescent installation, as it is such a tried and tested and well known technology. It does the job!

on the other hand it is also, let’s face it… a little boring, dull and staid. No one ever gets excited or passionate about a new fluorescent installation. For the past few years Philips Lighting has been telling the lighting market about the speed LED technology is advancing at and which conventional light source technologies will be surpassed by LEDs, in terms of energy efficiency, at which point in time. Fluorescent technology was always far down the line, beyond halogen, compact fluorescent and compact discharge lamps.

However if one looks at the latest levels of LED module energy efficiency in combination with the usual colour temperatures and colour renditions used in functional indoor, white lighting, then it is hard not to conclude that the fluorescent benchmark may have been reached.

What do you think? Energy efficiency, colour rendition, colour temperature, glare control, dimmability, cost? Is LED technology ready to take on fluorescent? Visit our LED Masterclass website, see what other lighting professionals think and voice your own opinion.

Annetta Kelso Philips Lightingwww.ledmasterclass.com

LEDoN-LINE DISCuSSIoN

MASTERCLASS

4 | LightSpec | ISSuE3/MAY2011


ISSuE3/MAY2011 | LightSpec | 5

LEDMASTERCLASS WEbSITE: LEDMASTERCLASS.CoM

// LED market developmentI still remember it…back in 2004 at the light+building fair…somewhere on the side of Hall 5; a very dark booth from a company called LumiLED with their biggest innovation: the 1 Watt Luxeon LED. White light, yet, virtually no light. In only 6 years, Haitz’ law proved its power again. At the light+building fair in 2010, LEDs and LED luminaires were everywhere, on the booths of every fixture manufacturer, and conventional light sources were hard to find. A wave in action; before you notice it, you are overtaken, riding the wave, or drowning?

// LEDs light sources are delivering on their promiseThe performance of LEDs is increasing by 20% per year and costs are rapidly coming down. According to a recent announcement in Digitimes, LED manufacturer Epistar from Taiwan was predicting that the LED cost would fall to >1,000lm/$ in 2015, so close to the cost of a fluorescent lamp. other Asian companies are following. LG has just opened a new wafer fab in Korea that’s the size of 26 football stadiums. It can handle 6 inch wafer for LED production, rather than the 2 or 4 inch wafer used by others in the industry. Thus significantly lowering the LED cost. Together with the trend to bigger LED dies like LuXEoN Rebel ES, it provides confidence that the cost curve will be met.

// The LED cost curveIn addition, LED drivers are simplifying and thus becoming more affordable. AC LEDs need only simple electronics to drive them. These innovations enable LED systems (LED light engines including the driving electronics) to follow the LED cost curve.

LED WavE

THE

“The wave has been building. I am curious what light+building 2012 will look like…”

Geert van der Meer, Global Product Marketing Manager LED Systems,

Philips Lighting

// LEDs change fastbut the challenges for fixture manufacturers still remain. Initially, everyone thought that LEDs were simple and provided ultimate design freedom. unfortunately the challenges were significant. LEDs change fast, meaning that fixture designs are quickly obsolete (as is the stock). With the LED wave hitting the industry, many lighting applications are screaming for an LED alternative. However, because oEMs had organized their fixture business around a 10 year portfolio renewal, their staffing capacity only allows for a 10% portfolio change per year. LEDs are calling for faster turn-around cycles and require a larger portfolio maintenance effort.

// Future-proof solutionsIn 2008, Philips launched the Fortimo concept. The world’s first future-proof LED light system. It consisted of a LED light engine and driving electronics. And it was designed in such way, that ever-changing LEDs were compensated for by lower power consumption, while keeping the light output, module dimensions and light distribution constant with new generations of LEDs. This concept freed any fixture oEMs from the maintenance effort. The technology was well accepted and has enabled fixture manufacturers to follow the LED performance improvement and cost down curves in an easy way. The wave has been building. I am curious what light+building 2012 will look like...

Geert van der Meer,Global Product Marketing Manager LED Systems


www.philips.com/lightspecINTERVIEW


// The TL5 storyThe current solution of choice in fluorescent is the T5 lamp. Introduced in 1995, the T5 technology was not an immediate success. Like many innovations it took time before it was understood and accepted. In this case the industry was sceptical about the differing performance at different temperatures, the new shape which required new auxiliary components and, of course, the different wattages with the same lumen packages caused confusion.

// a lighting benchmarkThis acceptance or learning process took 5 years. but from 2,000 onwards T5 has become the benchmark for efficient lighting in offices and many other applications. Its narrower profile gave designers the ability to bring more aesthetic solutions to market. Now, 10 years later, T5 accounts for approximately 70% of new installations in Western Europe that use fluorescent.

Innovations in T5 have continued to take place and now Philips MASTER TL5 Eco lamps are taking up a significant part of the market.

WHAT NEXT FoR FLuoRESCENT?

When we view lighting technologies in the market, fluorescent is clearly dominant. It is extremely versatile, being used in almost all applications and fulfils two key criteria: How much is the initial cost and what is the operating cost or lighting terms lumen per dollar and lumen per Watt?

NEW TubEThese lamps offer an additional energy saving compared with the MASTER TL5. So what will be next generation of fluorescent? It may well look like the new Philips LEDtube.

// Introducing LEDtubeThis new product from Philips comes in the same form as the T8 fluorescent tubes. Available in 2, 3, 4 and 5 foot lengths, it’s entirely compatible with current TLD luminaires. The solution gives a perfect continuous line of light so it’s impossible to tell that the light source is LED, unlike many other TLED solutions on the market where the individual LEDs are visible. The LEDtube also has one very obvious benefit over conventional alternatives, the electronics are integrated into the lamp, giving you a one piece solution.

// Is it ready for all applications?The ability to operate at extremely cold temperatures gives the LEDtube significant advantages in cold stores and freezers. Conventional fluorescent has issues with re-ignition and is therefore run 24/7 resulting in high running costs. What’s more, because of

the 40K hour’s lifetime and robust housing we can see the LEDtube being used in niche areas where maintenance costs are high.

// So is LEDtube ready to replace fluorescent?If we refer to two of the key parameters of fluorescent success “lumen per watt” and “lumen per dollar”, then LEDtube still has some way to go. Its performance is comparable to TLD but in terms of cost a gap exists. To compete with TL5 the LEDtube therefore needs to improve in both criteria.

So for now the most efficient and most affordable solution is Philips MASTER TL5 Eco in combination with Philips HF-Performer III gear. but in the future that may be different.

Philips Super 80 TLD 18W Philips Master TL5 14W Philips Master TL5 Eco 13W Philips Master LEDtube

Lamp Efficiency 74 lm/W 96 lm/W 100 lm/W 70 lm/W

System Efficiency 70 lm/W 86 lm/W 90 lm/W 70 lm/W

Initial Output 1,200 lm 1,350 lm 1,350 lm 750 lm

System Power 20 W 15 W 14 W 11 W

Lifetime 20,000 hr 25,000 hr 25,000 hr 40,000 hr




PRoDuCT NEWS

T5 oR NoT T5,

A few years back the speculation was ‘when will LEDs take over in general

lighting?’ Well, we’ve become a little bit more sophisticated since then and

we now know that that’s not the right question. because we can see that this

particular technological shift isn’t happening in one fell swoop. Instead, LEDs are

conquering the industry niche by niche: First it was bicycle lights, then car break

lights, then emergency lighting, then fibre optics, then refrigeration, then task

lights, then car headlights. If you were at the EuroShop exhibition in March, you’ll

know that we are close to the tipping point in the retail display sector too.

but what of offices? Well, I predict that offices, along with supermarkets, will be the last sector to fall to solid state. And it’s all because we did too good a job with fluorescent: The T5 is such a perfect source, why would you want anything else?

First and foremost, the T5 still trumps the luminous efficacy of LED. How many LED units on the market can hit the magic 100-lumens-per-Watt metric? And how many can match its colour quality?

And even if they did, can you buy a LED source that delivers 6,000 lumens for the price of a big Mac? Thought not. The fashionable new metric – lumens per dollar – cruelly exposes the shortcomings of LED.

Ha, you say. but what about life? What about maintenance? Well yes, T5 has a life of around 17,000 hours while LED has the mythical 50,000 hours. but is maintenance in an office such a big deal? To change a T5 in an office you don’t need an expensive team of highly-trained contractors. You don’t need a cherry picker. You don’t need to stop the traffic. often you don’t even need a ladder.

The truth is that, looking soberly at the costs and technical specifications, T5 wins hands down. but if we judged everything on the sober facts we’d all be driving Skodas. There’s a degree of aspiration at work here. often clients are determined to have LEDs installed because it’s sexy. And we all like to be early adopters, don’t we?

The aesthetic appearance, not the efficiency, was cited as one of the main reasons why the Japanese bank, Namura, installed 70,000 LuXEoN Rebel LEDs in 2.2km of recessed luminaires at its office in the City of London. At the time, last autumn, it was the largest LED office scheme in the world. The installed load is pretty standard at 12W per square metre.but hey, it is going to happen. LEDs will take over from T5, it’s just a matter of time.

I am typing this under a twin T5 luminaire – its next upgrade will be to LED, I’m sure. but it won’t be this side of the olympics. The Rio olympics, that is.

www.luxmagazine.co.ukNamura office project report: http://bit.ly/LEDoffice

THAT IS THE QuESTIoNRay Malony, Editor of Lux magazine, shares his thoughts on LEDs in office lighting.

“I am typing this under a twin T5 luminaire - its next upgrade

will be to LED, I’m sure.” Ray Malony, Editor of Lux magazine


ISSuE3/MAY2011 | LightSpec | 1110 | LightSpec | ISSuE3/MAY2011

The use of comfort cooling has increased substantially in Swedish offices in recent years. The reason is mainly due to the increased use of more computers and copying machines, together with less space per office worker. The trend in architecture for larger windows is also a contributing factor. The practice of using more energy efficient lighting has developed together with an increase in the use of lighting controls.

// Energy balance is importantIn order to reduce energy use the entire building's energy balance was studied, because building design and tenants activities widely interact. This entailed reviewing the solar shielding, the ventilation system and its operational strategies as well as the thermal load that the activity itself contributed. only then could the most energy-and cost-effective solutions be identified.

// Comfort coolingIn order to restrict the use of comfort cooling in the office and still allow a high utilization of glass surfaces, people must be able to protect against

The demonstration took place in Vasakronan’s premises in an existing office building, “Norrtull-palatset”, in Stockholm. The starting points were:• Daylight has the potential to be exploited,

particularly during the spring, summer and autumn, to replace electric lighting

• Minimize use of comfort cooling

// The result A reduced electric energy bill:• Electricity consumption for lighting varies

between 12 and 26 kWh/m2

• Saving (compared to daily use of 9 hours) is estimated at approximately 37-68%

These results confirm the measurements in the daylight laboratory in Lund.

// Is this investment profitable?It has been difficult to assess the savings for electricity use. From LCC (life-cycle cost) calculations we can see that the savings are not strictly profitable. It requires taking up solar shading at an early stage in the building process, to avoid an increase in the initial cost of including extra coordination by having to hire

Daylight controlled office lighting and motorized blinds can save electricity for both lighting and cooling in our built environment. Peter Pertola from WSP Lighting gives his view on the current debate.

CoLDHoT V S

WSP LIGHTING “The results showed a savings potential for electricity for lighting of around 50%.”

Peter PertolaLighting Specifier,WSP Lighting

direct sun. This can be done through the use of colour neutral sunscreen glass with a comple ment of different forms of fixed and variable solar control.

// Solar shielding and daylight linkingAn investigation project carried out "Solar shielding and daylight linking" using measurements taken in a daylight laboratory in university of Lund (LTH). The study involved standard products available on market so it can be used in existing buildings. Standard venetian blinds between window panes together with daylight controlled energy efficient lighting were used in an office space. bELoK (A procurement group of Real Estate owners) was responsible for the project, which was carried out with support from Vasakronan and Midroc (Real Estate owners) and companies from the sunscreen industry and fixture manufacturers.

// Savings potentialThe results showed a savings potential for electricity for lighting of around 50% on an annual basis for daylight office areas, which can

be assessed at around 25% of the entire office area. In addition, electricity saving for cooling was calculated with “Parasol” at approximately 10%. The project is presented in a report from LTH, Department, Energy building Design, EDb-R-07_15.

// Demonstration projectA demonstration project was started as a follow-up to the laboratory measurements. The project was carried out in 2007-2009. The purpose was to gain experience with dynamic, solar shielding in coordination with daylight controlled energy efficient lighting with presence sensors.

To create a lighting system that provides both visually accurate and energy efficient lighting some steps must be taken: • Choice of light sources with good quality

spectra and efficiency (e.g. fluorescent, metal halide, LED)

• Choice of luminaire that offers good lighting distribution

• use of an appropriate lighting control system

additional expertise. Normally landlords think that the tenants should bear the cost for solar shielding! At the same time, it may be a little too easy to let electrical savings from daylight control cover all investments from the installed systems. other values must be taken into account if the investment is to be profitable, such as lower cooling consumption and better visual comfort.

// What tips can you give for the procurement of energy-efficient lighting?In general I think there is a need for landlords to take greater responsibility for the energy flow within the building. Then we can avoid the old problem of "split-incentive", i.e. that the landlord has the benefits of the reduced energy cost to get pay-back for the investment. It is also important to take up technological skills early on in projects. It must cover areas such as solar screening, window and lighting design.

// Future thoughtsuse of LED: efficiency is developing all the time, no mercury and good spectrum are good examples of the advantages of using LED.

I’m definitely positively wary and follow the developments very carefully. unfortunately the selection of luminaires for indoor lighting is not developed enough yet. use of control systems: LED has a good possibility to be controlled and offer instant light when turned on.

Peter Pertola,Lighting Specifier, WSP LightingE-mail: [email protected]




INTERVIEW

SPoTLIGHToNoFFICES

LuX LuMEN b

// Is LED overtaking fluorescent?Let’s focus on professional solutions only. Today’s LEDs are a very valid alternative for many “old school” light sources in terms of performance and light quality. They already achieve almost T5 lamps efficacies and this will still improve in the years to come. Improving processes and optimized platforms will lead to higher efficacies. This will keep pushing technology to its boundaries, lowering heat losses and giving higher outputs. l believe in totally new, unconventional systems or approaches for office lighting with optical foils, surfaces, micro optics, and much more.The LED TL replacement solutions that we find in the market today are not the professional way to go for offices since you are putting a new luminaire into an existing luminaire. The reasoning is simple; the initial specifications and requirements from the original design (photometrics) are no longer valid and will show a totally different result. Fluorescent linear light sources are actually a lighting surface which is part of the optical system especially designed for the specific task. Typical office lighting provides very soft shadows, excellent uniformity and

“This is just the beginning for LEDs. Fluorescent will be the toughest battle

and challenge to overcome.”Chris De Langhe

Sales & Applications Engineer, Lux Lumen B

a balanced horizontal and vertical Illuminance ratio. Last but not least is glare-free operation. What’s more, today’s T5 top solutions are extremely energy and optical efficient with short pay back times for investors and are fully recyclable at end of life. but it’s the cost-per-lumen of T5 that will be the point to beat. This is just the beginning for LEDs. Fluorescent will be the toughest battle and challenge to overcome. The last “old school” technology to be caught up by LED. It’s time for transition.

// Do LEDs meet your expectations in office lighting?With an open mindset, it is possible to make an excellent LED-based lighting plan. It’s feasible today, but I’m afraid it’s not quite so affordable.

// What is important for lighting designers when specifying LED lighting in offices?Simple. The principles of good lighting and lighting design should remain the same at all times. Accept nothing less. Progress means improvement in terms of quality!

// What are main challenges for LEDs in office lighting?The challenges will be for both luminaire manufacturers and/or LED engine suppliers. They will need to explore new innovative ideas that have been made possible by the technology. Think outside the box? There is no box at all! It’s a Tabula Rasa.

It’s also important to make the entire system really innovative and highly efficient from the LED and the drivers to thermal and optics. Excellent glare control and limitation is also a must. What’s more, investors will be looking for a system pay back time that does not exceed 3-4 years, since the office segment is a very rational environment in terms of TCo/RoI.

When it comes to ambience, soft lighting effects with no hard shadows and an excellent ratio E hor/vert will be most desirable. And fully controllable of course. Higher lumen packages, sources and engines are also a must, as is lowering LED lumens per euro.


14 | LightSpec | ISSuE3/MAY2011 ISSuE3/MAY2011 | LightSpec | 15

// To what level can LED modules be passively cooled and when is active cooling recommended?

NUvENTIX: Actively cooled LED fixture designs should be considered when the thermal wattage to be dissipated is greater than 15 W. In today’s terms that generally means over 1,000 lumens. As the power levels increase, active cooling benefits become more and more pronounced.

SUNON: It depends on factors such as the final customer design and the available space. For a 7W MR16 LED lamp, active cooling is necessary to keep the lamp compact comparing to a halogen lamp. For Spot Light, active cooling is interesting starting from 10/15 W since weight and limited space are key factors. As for Down Light, we can consider active cooling starting from 15/20 W as there is enough space in the ceiling for a bigger heat sink. Active cooling can reduce up to 80% of weight and size comparing to passive solution.

avC: Thermal loads and luminaire shells determine whether LED modules are passively or actively cooled. The active solution is best used in an outdoor environment, and the LED design must ensure there is a good uniform airflow. Proper thermal management and design is a crucial design consideration in high-performance lighting systems, but there is no ‘one size fits all’

and other influencing factors exist. We measure the sound pressure at one meter and set the proper distances between each LED module system with the active coolers in the room. of course, the background is also crucial. An open space and larger room size can be more suitable. Environmental conditions, positioning, the space of the room, and the luminaire openings must be taken into consideration when placing any active coolers. AVC’s lower-noise coolers can only be displayed properly and create a comfortable user environment when properly installed.

// What works better: thermal paste or a thermal pad?

NUvENTIX: Thermal paste is thermally very good. Thermal pad is also very good thermally but is easier to use.

SUNON: Customers should use the material offering less thermal resistance and higher longevity. Each material has advantages and drawbacks. In general, thermal past offers less resistance, but it is more difficult to use in terms of proper usage amount. Thermal pad is an easier solution; however, it may offer higher resistance if the quality is not good.

avC: options should be determined on the basis of higher thermal conductivities and personal

“Customers should use the material offering less thermal

resistance and higher longevity.”Alipio Marques, Sunon Regional Sales Manager.

We asked three thermal management solutions specialists,

NUvENTIX, SUNON and aSIa vITaL COMPONENTS,

five key questions on LED fixtures and cooling:

solution; sometimes a passive solution is enough, but other times an active solution with a fan is more suitable. The choice must be based on the thermal load and physical design of the LED luminaires. In a recent design made with Philip’s Spotlighting LED System, for example, AVC developed both passive and active designs. Given a thermal load of 17 W, both designs can maintain a thermal load below 65ºC to ensure optimal LED life time. Customers choosing which cooling option will best fit their lighting designs, however, must weigh the many differences between the two. Form factor is one aspect; the passive design measures W 100 mm x H 105 mm, while the active design is a mere W 65 mm x H 10 mm.

// What is the risk of “noise pollution” when a ceiling contains significant amounts of active cooling heat sinks?

NUvENTIX: There is little risk of noise pollution when a ceiling contains significant amounts of SynJet cooled heatsinks. Noise levels will vary by application. When the solutions are recessed into the ceiling you should have very little impact on general ambient noise. If they are hung higher than 10 feet again you should have very little impact to ambient noise. When they are in open air you have to consider a few more factors. Noise levels are impacted by both the total sound level dbA, but also the tonality of the sound. SynJet cooling solutions for lighting

operate in low frequencies, <500 Hz, where the human ear is not as sensitive. As a result it sounds better than another sound source at the same dbA level. In addition, the drop off of acoustic sounds is exponential. If you are 2 meters away from a SynJet running at 18 dbA the dbA level drops by 6 dbA, which is almost inaudible when compared to a whisper at 20 dbA and a quiet residence at 30 dbA. With these two phenomenons room noise will vary over given points in the room depending on how close you are to the light sources. With the exponential drop off and low frequency noise from a SynJet, noise pollution will rarely be a problem.

SUNON: Fan selection is crucial. SuNoN cooling module maintains a noise level between 16 and 18 db(A) at 1 meter. It can barely be heard, even with many cooling modules in a ceiling. SuNoN cooling module avoids noise caused by fan vibration thanks to its specialized Magnetic Levitation (MagLev) Technology comparing to traditional bearing systems. SuNoN’s dust-resistance structure prevents dust from getting inside the bearing and maintains stable, low noise levels after several years of use.

avC: All luminaire light manufacturers strive to create a comfortable LED experience and strong brand associations. Clients creating new LED solutions may wonder how a LED product’s life span can be prolonged - including what methods

preference. AVC prefers to use thermal grease (thermal material interfaces, TIM) optimized for high thermal conductivity usages. Its advantages include a) reduced thermal impedances between two solid surfaces, b) its filling of air gaps for better conductivity, and c) effective heat transfer. AVC’s coolers are certified together with Ziitek’s thermal grease, TIG780-50, with 0.13 mm to 0.17 mm thickness, as the simple assembly approach.

// is there a gradual build up of dust with active cooling over time?

NUvENTIX: SynJet coolers are not affected by dust build-up over time. SynJets do not have any bearings or lubricants that can be clogged or break down with dust. The high velocity pulsing of a SynJet keeps the nozzles free of dust. As a result dust has no affect on a SynJet’s ability to keep LEDs cool.

SUNON: Yes, dust can be accumulated over time. This is why SuNoN preserves more margins when designing cooling solutions to adapt to a variety of luminaire design and minimize the dust impact. SuNoN Dust-Resistant MagLev Technology is a one-piece structure and protects the bearing from dust invasion to ensure cooling efficiency and long life. A self-cleaning function with two-way rotation motor is also available for applications in a dusty environment.

avC: Dust can gradually build up in the environment where it is used. However, our active solution, particularly the fan, which contains ball-bearings and has been dust-proofed, prevents dust from affecting the LED Module System. The dust-proofing of the fan has also been tested in the dust chamber with talcum powder for a continuous eight hours, IP5X. The results were positive. under inspection by microscope the fan itself was seen to be working functionally and to be in good condition.

// how can luminaire manufacturers obtain a sample?

NUvENTIX: Samples are available from the Nuventix website, www.nuventix.com.Francois Jaegle

SUNON: SuNoN has a complete distribution network or a sales representative worldwide. Please send your enquiries to [email protected] Marques

avC: For more information, best practice guide or samples, email: Mrs beatrice Tseng at [email protected]




INTERVIEW

LED LIGHTING

WILL IMPRoVE

THE oFFICE SPACE

“All together, LED lighting and controls will give new meaning to lighting in offices. It contributes to people well-being and

offers new opportunities for saving energy.”Corné Voermans

Director Segment Marketing Office and Education

PHILIPS LIGHTING

// The office space is changingThe world of offices and people’s working lives are changing rapidly. Less than a few decades ago, office work was, to great extent, desk-oriented paperwork with fixed start and end times for a day’s work. Today, people work longer hours than ever before, and they do it more flexibly, with big variations in location and time. The softening of hierarchy and organizational de-layering has led to more teamwork, autonomy and communication. Consequently the office structure and use of space is changing. Flexible working, open plan, communal spaces, silent rooms, brand personality: we are moving from a standard, static office to a more dynamic and natural place to engage with others. Compared to standard office lighting with fluorescent tubes, LED offers great support for the changes in the office space: freedom of shape and design, use of colours, dynamic effects in intensity and direction, creating spaces for enhanced comfort and wellbeing. In addition, LED brings great energy savings, especially when combined with lighting controls.

// LEDs bring new value to the office spaceLED technology is emerging very fast. LEDs already more than qualify for all areas in an office building, outperforming conventional solutions in terms of contributing to people comfort and wellbeing, as well as saving energy, and supporting our customers’ sustainability and carbon reduction ambitions. Philips lighting has developed LED solutions for all office spaces, from lobby, corridors and meeting rooms to open plan offices and board rooms.

For instance, DayZone is an exciting LED luminaire that offers high visual comfort for people by taking away any possible overhead glare that would hinder office screen work. What’s more, this high quality office-compliant LED solution offers compelling reductions in energy consumption

The revolution in lighting that LED technology is bringing, leads us to one of the most inspiring eras in lighting history since

many decades. What started with just some LED decorative lighting a couple of years ago, has led to a complete portfolio

of LED lighting solutions that are highly suitable for all areas in the office space. Today, LED lighting goes way beyond the

basic qualification level and offers additional value from light quality, as well as from an energy consumption perspective,

for offices. This creates exciting opportunities; new value with LED lighting for better office spaces.

compared to conventional solutions, particularly when combined with controls.

// Contributing to green Buildings with LED lighting and lighting controlsIn response to a growing demand to minimize the environmental impact of buildings, many organizations have developed Green building certification systems. For example, LEED (Leadership in Energy and Environmental Design) is a rating system started by the united States Green building Council whereas bREEAM (bRE Environmental Assessment Method) is a system established in the uK by the bRE (building Research Establishment). both LEED and bREEAM are widely accepted as international standards for Green building certification. our solutions contribute to Green buildings, not only by making buildings more energy-efficient, but also by enhancing the indoor environmental quality. our Powerbalance luminaire and LuxSpace down-light for example, offer an optimal balance between high energy reduction levels and office compliance. Combined with our Philips-Dynalite lighting controls, you can achieve optimal support for Green building certification.

// Better office spaceAll together, LED lighting and controls will give new meaning to lighting in offices. It contributes to people well-being and offers new opportunities for saving energy. That’s why Philips Lighting is committed to bring LED solutions to the market for better office spaces.

Corné Voermans, Director Segment Marketing office and EducationPhilips Lighting PLS EMEA



// BackgroundThe parliament building in the German state of North Rhine-Westphalia (NRW) is beautifully situated on the banks of the Rhine in Düsseldorf. This complex, of great architectural interest, was built in 1988 and was the first newly constructed post-war parliament building in Germany.

// The challengeWhereas this modern building has lost nothing of its futuristic power after over twenty years, the same could not be said of the lighting in the assembly chamber. “It was harsh and unfriendly, and the lamp ballasts constantly produced a quiet but annoying sound. They also emitted heat, which was not pleasant for those using the chamber. Enhancing the parliament members’ well-being was, therefore, a pressing need.” That was the conclusion reached by the lighting designers at buro Peter Andres Lichtplanung in Hamburg. This firm was given the job of improving the working conditions by means of a new lighting concept and at the same time minimizing the environmental impact and energy costs, because the energy costs of € 50,000 a year were really very high compared with today’s technological options. // The solutionburo Peter Andres developed a lighting concept in which different lighting components were geared precisely to one another and to the requirements of the chamber and its users. For the general lighting the handsome Hoffmeister 170 un.limited LED downlights were fitted in

HoFFMEISTER DoWNLIGHTS WITH PHILIPS FoRTIMo LED DLM TECHNoLoGY

Thanks to the new lighting, the annual energy costs of € 50,000 have been reduced to just € 5,000, while maximum light comfort has been achieved. And due to the long life of the Fortimo LED module – 50,000 operating hours – the maintenance costs are considerably lower, as replacing lamps in this high chamber costs a great deal of time and money.

Minimum energy costs, maximum light comfort in NRW parliament assembly chamber

Energy reduction from € 50,000 to € 5,000 a year.

The handsome downlights unobtrusively follow the chamber’s ground plan, which is surmounted by a glass dome

the four concentric circles. In this way they unobtrusively follow the chamber’s ground plan, which is surmounted by a glass dome. These downlights are fitted with the Philips Fortimo LED DLM 36 W module, which produces 2,000 lm – the same light output as the original halogen lighting, but far more energy-efficient. The indirect light from the linear floodlights, which have been fitted around the slanting dome, lends the chamber a very pleasant atmosphere at night. LED spotlights provide dramatic illumination of the rostrum.

// The benefitsThanks to the new lighting, the annual energy costs of € 50,000 have been reduced to just € 5,000, while maximum light comfort has been achieved. In order to obtain the highest energy efficiency, fins have been fitted on the outside that move with the sun. The use of daylight regulation means that daylight and artificial light are constantly in balance with one another and in this way the costs of cooling the chamber are kept down. The long life of the Fortimo LED module – 50,000 operating hours – also provides extra benefits. It means that the maintenance costs are considerably lower, as replacing lamps in this high chamber costs a great deal of time and money. because the 170 un.limited LED downlight has excellent heat discharge, the high light output and long life of the Fortimo LED module are guaranteed. With this innovative lighting solution, the NRW parliament has also come a considerable way towards achieving its ambitions in the field of Co2 reduction – 20% lower in 2010.




CASE STuDY

// How will LEDs start to take over from fluorescent?We can see two ways of replacing fluorescent tubes. one of them is retrofits. Retrofit manufacturers can offer good solutions by using last generation LEDs. The final results are really good, but we believe that this is not our way. of course, if the end consumer asks for this solution we are ready to offer luminaires for this application, but from our point of view it is simply not professional. We need to provide our customers with total LED lighting quality and this goal can only be reached with specially designed luminaires. We have to combine all the important aspects like thermal management, optical design and electronic design to fulfill all the requirements for total quality luminaires. For office applications, which is our main domain, we need to comply with a lot of norms; glare for example, and this is not so easy. The development of new materials puts us in the position of having to find good solutions in a short time. We actually now work on six different, sophisticated options to see how best to achieve all market requirements.

// Which type of luminaires will be replaced first and why?The development of LEDs is very fast, so in a very short time we can replace all types of luminaires. Producers of LED chips are starting to offer us LEDs with an efficiency of more than 100 lm/W in mass production,

“Our mission as luminaire manufacturers is to find sophisticated

solutions to take advantage of LEDs and eliminate their disadvantages.”

Miroslav Masár, LED Department Director, OMS

GooDbYE FLuoRESCENT, HELLo LED

oMSso the route for widening their use is here. Now it has begun, our mission as luminaire manufacturers is to find sophisticated solutions to take advantage of LEDs and eliminate their disadvantages.

// What issues do LEDs still need to overcome?If we are thinking about luminaires for offices, it is important to solve the problem of glare. We believe that the first good results will be with indirect luminaires, because with them we can easily eliminate glare. We can offer these luminaires for areas where there are no limit requirements for average luminance. For this application we have a luminaire in our portfolio called Indirect Vega, which also provides the option of ambient lighting.

We also achieve very good results by using sophisticated solutions for offices with “invisible lighting”. For example, our becrux luminaire fulfils all norms for offices. The luminaire has a nice design and people are not dazzled by light. You cannot even see where the light is coming from. The distribution of light is very homogenous, because we use a special optical system with advanced lenses. A tunable white light version is also available. We are sure that the replacement of fluorescent has started. of course, we have some specific problems to solve, but the LED revolution is happening very fast.



// What, in your opinion, are the biggest challenges the lighting industry faces today?

I believe it is to deliver peace of mind to the customer with new technologies. When talking to customers about LEDs it always comes to the point where we have to answer the question what will happen when the light source fails? Here I do see good activities by approaching the market with standardized module solutions. Nevertheless, LED technology provides opportunities for customized and individual designs where we see need for differentiation of products.

// You are active in indoor lighting in areas such as offices, schools, and hospitals. How do you see the progression of LEDs into those applications specifically?

The most progress I see in office applications where we have very competitive LED solutions for downlights already. Performance and cost have evolved to a level where there is actually no need to go for a conventional solution based on CFL anymore. but the progress does not stop there. Next to downlights I see classical TL-solutions being replaced by LED solutions since price-performance-ration is increasing to a level where it really makes sense to think about that. When we have reasonable priced LED solutions being comparable to TL-luminaires these will quickly be adopted in projects.

// What do you perceive as roadblocks for indoor lighting today that LEDs might solve in the future?

If we think about what else light can do I think LEDs will open a new horizon to the lighting industry. Thinking about tunable white or RGb solutions, we can offer enhanced benefits to customers beyond just making bright, white light. We see first examples in applications such as hospitals or schools where light has a proven positive impact on people’s wellbeing and behaviour. This is something traditional light sources were only able to deliver in a very limited way.

// What are the key success factors for the future for a luminaire manufacturer?

From my point of view there are 4 points I can mention here: one thing is to choose for the right partners you believe capable of shaping the future with. Secondly, it is simply the ability to be fast. There will be quite some shake-up in the industry over the next five years and I think some, who are not fast enough, will get lost. on that path you will have to take some risks to deliver speed and be on the market quickly. Finally, and this is an important asset of our organization, you need to combine all that with a lot of know-how on applying new technologies into lighting. Lighting engineering is not becoming less complex with LEDs, so you have to put a lot of resources into that.

Mr. Dirk Pietz, Executive Product Management TRILuX

THE bIGGEST CHALLENGES

TRILuX

// Energy efficient, miniaturized designWith an energy efficiency of 95 lm/W, Fortimo LED Strip is a perfect choice for replacing T5 lamps as a design in to new fluorescent luminaires. Due to its miniaturised design, however, it is also ideal for creating new luminaire shapes and concepts. Square, rectangular or triangular module layouts, as well as new 3D dimensions can all be explored, literally taking functional lighting to a new dimension.

The Fortimo LED Strips are 280 mm (approx 1 foot) in length with a 630 lm output. They will be available to oEMs from May 2011 onwards, in a colour temperature of 4,000K, Colour rendering Ra80 and a luminous efficacy of 95 lm/W.

// Xitanium driver for fast design inThe driver to be used with the new Fortimo LED Strips is the Xitanium 75 W 0.2 – 0.4 A, 200 V TD. A Touch and DALI driver, it’s compatible with all Philips DALI controls, such as ActiLume and occuPlus. The housing has been specifically selected to match the current T5 360 mm driver housings, to allow fast design in to existing T5 luminaires. It’s also a programmable driver, which can easily be adapted to the number of Fortimo LED strips to be attached. In the standard format this is between 5-10 Fortimo LED Strips per driver. With an efficiency of 0.92 Xitanium is one of the most efficient LED drivers on the market.

For further information, go to www.philips.com/fortimo

TAKE LIGHTING To A WHoLE NEW DIMENSIoN

FoRTIMo LED STRIP

In May this year we’ll be introducing a new Fortimo LED Strip system to the market, offering the perfect mix of design

freedom and high energy efficiency. The Fortimo LED Strip is a high efficiency, high quality white light module for oEMs

to design in to new luminaires in applications where linear fluorescent lamps are currently the dominant choice.



INTERVIEW PRoDuCT NEWS

or mobile products, because professional lighting is not considered a consumer product and, as a result, the response time may be slower.

// E-lighting is the way forwardThe lighting industry will therefore move into e-lighting, as LEDs are intrinsic electronic devices. This means the electronics industry will play an important role in lighting and this, in turn, will make the marketplace more dynamic and competitive, calling for companies that are able to respond rapidly to the very rapid advances in LEDs. Every day new players are emerging and new solutions are being launched; this progress is paving the way for new roles and new areas to be explored.

// Competition will create new opportunitiesWhile semiconductor manufacturers and nanoscience researchers will play a key role

// SSL technology is developing rapidlyThe lighting industry is responsible for 20% of electricity consumption worldwide. Solid-State Lighting (SSL) is fast becoming the most efficient source of white light, and there is huge potential both for improvements in this technology − thanks to significant progress in nanoscience − and for cost reduction through high-volume manufacturing. These two advantages are causing SSL technology to develop rapidly, driven partly by the fact that, as one of the most cost-effective green technologies, LED technology can help to reduce global energy consumption. This technology needs to be supported by governments and accepted by society as an eco-lighting solution. However, we cannot expect the changeover to this technology to take place as quickly as other similar technological changes took place in non-professional products, like LCD TVs, LED TVs

“One thing is clear: lighting in the future is never going

to be the same as it was in the past.”Lucas García Rodríguez,

Director of the LED Division, Optical Department and Laboratory

THE “DIGITaL LIGHT ERa” HAS DAWNED

in this industry in the future, lamp and ballast manufacturers will also have to reinvent themselves and adapt their operations accordingly. They need to take action because “lamp systems” are more accessible for other players to develop and manufacture. As a result, there will be greater competition in the market. This competition will open up new opportunities and create greater freedom for luminaire manufacturers, giving them a choice between a light engine, LED module or discrete LED as the light source to be integrated into their luminaires. It is also possible that new “throw-away” luminaire concepts – with no light source replacement – may catch on, given that LEDs have a long lifetime if they are well designed.

one thing is clear : lighting in the future is never going to be the same as it was in the past. Let’s see what the future holds…

// The incredible impact of LED

When the first white LEDs were introduced onto the market nobody knew what an

incredible impact they were going to have. Fifteen years later, there is no doubt that the

light produced by this disruptive technology based on solid-state physics offers significant

advantages over light from conventional light sources. LED technology is forcing the

lighting industry to move on from analogue lighting and to enter the ‘digital lighting era’.

This transition brings with it significant changes, huge challenges and great opportunities.

Lucas garcía-Rodríguez: Curriculum vitae

Lucas García-Rodríguez graduated in Physics from the university Autónoma of Madrid (uAM) and also obtained a degree in Electronics Engineering from the university Complutense of Madrid (uCM). Having studied various postgraduate courses, Lucas is currently engaged in doctorate studies. After working in the telecommunications industry for Vodafone and the Abengoa Group, and as a researcher for the uCM optics Group, he is now Director of the LED Division, optical Department and Laboratory of the Lledó Group, where he is working on the development of innovative optical systems and technologies for lighting and daylighting. With 7 patents in LEDs and lighting to his name to date, Lucas also represents Anfalum (Spanish Association of Lighting Manufacturers) and the European Celma (Federation of National Manufacturers Associations for Luminaires and Electrotechnical Components for Luminaires in the European union) LED working group.

LLEDó



// Zhaga approves first specificationon February 16, the Zhaga Consortium approved the first light engine specification. This specification describes the interfaces of a downlight engine with integrated driver electronics. More specifications are under development including a spotlight engine and a flat emitter street lighting engine. Details can be found on the Zhaga website.

// Interchangeable LED light sourcesThe Zhaga Consortium aims to make the LED light sources (“LED light engines”) manufactured by different companies interchangeable. Interchangeable light sources are easier to work with for luminaire manufacturers because they provide stability in their product design without being locked in with a single supplier for the light source.

// Co-operating competitorsManufacturers of LED light sources, lamp holders and luminaires co-operate with Zhaga to help define the interfaces of LED light engines. Zhaga specifications are developed in work groups. These groups draft and review the specification, build prototypes and verify their interchangeability. The Zhaga specification for the downlight engine was developed in a work

group with contributions from many companies. Stucchi, bJb, Ideal, Micron, osram, Philips, Samsung, Toshiba, and Zumtobel developed the prototype lamp holders and light engines that were used to verify Zhaga’s downlight specification.

// Competing competitorsZhaga only standardizes those aspects of LED light engines that must be absolutely fixed to ensure interchangeability. This is the outside interface of the light engine. The inside of the light engine is a ‘black box’ and manufacturers are free to choose their own implementation. They can innovate and differentiate their products by using different LED technology and by offering different performance, quality, and cost levels.

// Growing industry support for ZhagaZhaga’s membership has grown from 83 companies in September to 114 companies in February 2011. Companies from Europe, Japan, Korea, China, and the uSA have now joined the Consortium.

For more information, please visit www.zhagastandard.org

“The inside of the light engine is a ‘black box’ and manufacturers are free to choose their own implementation.”

Menno Treffers, Secretary General of the Zhaga Consortium

ZHAGA



// LuXEoN Rebel ES insideFollowing the pre-announcement of upcoming changes in the specifications of the European Fortimo LED DLM family, issued in February 2011, Philips Lighting would now like to confirm the new specification changes, which will take place in week 21, May 2011. The current European Fortimo LED DLM Gen 2 1,100 lm and 2,000 lm modules will become Fortimo LED DLM Gen 3 1,100/2,000 lm modules. This will be due to the incorporation of the new Philips LumiLeds LuXEoN Rebel ES LED inside.

Philips has a future proof design for all Fortimo LED modules, in which an annual LED efficacy upgrade is planned without changing the dimensions, lumen output or beam characteristics of the module.

The next generation GEN 3

Fortimo LED DLM

The new Fortimo LED DLM Gen 3 modules can still operate on all existing Fortimo and Xitanium driver combinations and the 2,000 lm module will also work on the new Xitanium 50 W range.

The Fortimo LED DLM 3000lm family will have an addition of two new colour temperatures, extending the range to 3,000 K, 3,500 K and 4,000 K. Further communication on the new specifications will follow in the next few weeks.

At Philips we’re constantly developing

our solutions to ensure they use the very

best technologies. With this in mind, we’d

like to give you advanced notification of

upcoming changes in the specifications of

the European Fortimo LED DLM family,

which will take place in May 2011.

TypeModule Power

Module efficacy

Fortimo LED DLM 1,100 12 W/830 Gen 3 12 W 91 lm/W









PRoDuCT NEWS

// Sustainable and smartLighting controls are key to creating lighting solutions that make the maximum difference in terms of reducing energy usage. At the same time, they effectively manage the quality of light, enhancing people’s lives – at the office, n industry, in shops and at school. And the beauty of stand-alone controls is that they do all this in an extremely simple manner – now that’s smart!

// Energy efficiency and comfortone of the primary benefits of lighting controls is their ability to reduce energy consumption – by as much as 55%! At the same time, they can improve the ambience of any indoor environment and the well-being of those within it. Light levels and/or colours can be adjusted dynamically to an individual’s needs, moods and preferences, enhancing the comfort and enjoyment of those using the space.

// Enhancing livesPhilips’ innovative stand-alone lighting controls are not only revolutionizing the way people

Global warming, climate change, carbon emissions. Words that seem to be

on everyone's lips. Today, we all know that our energy consumption comes at

a price. Commercial, institutional and industrial buildings now account for about

half of total energy consumption. And up to 35% of the electricity used in office

buildings, for example, is spent on lighting. It’s time to take control.

STAND-ALoNE LIGHTING CoNTRoLS

FoR SMART AND SuSTAINAbLE ENVIRoNMENTS

manage and enjoy their working and living spaces, but are also helping to create smart and sustainable environments for future generations.

// Wide choice of lighting controls: Stand-alone solutions or networked solutions?Lighting controls range from simple switches to advanced integrated systems made up of user interfaces, sensors, controllers, drivers and system software. These solutions make it possible to improve the lighting, appearance and energy efficiency of almost any building.

‘Plug and program’ solutions are usually networked and work in combination with other building management systems to perform a host of functions. but they always require programming of the system and additional costs, time and resources.

Stand-alone lighting controls do not require integration in a network. ‘Plug and play’ and ‘Plug and configure’ solutions work right out of the box and require little or no commissioning

to achieve optimal results for most (more than 70%) of the controls projects and applications requested by the market.

Therefore, in the first stages of every lighting project, lighting planned in combination with a controls solution is key to identifying the kind of solution needed in each case (‘stand alone’ or ‘networked solutions’). In line with its promise of “sense and simplicity”, Philips has developed an extensive controls proposal to help customers choose the optimal, cost effective and easy to use solution to cover their individual needs.

Nacho Cinza,Marketing Manager Lighting ControlsoEM Lighting Solutions EMEA




PRoDuCT NEWS

// Comparing colour temperaturesPhosphor white LED sources use a blue or uV LED with a yellow phosphor coating to produce white light. They are very efficient at producing light at the cooler colour temperatures, which have a fair amount of blue in them, but are less efficient at producing the warmer colour temperatures, which have more red.

Cool white LED lighting fixtures (4,000 K and above) have had the same, or superior, efficacy as comparable conventional luminaires for some time. However, until recently warm phosphor white LED sources and fixtures (3,000 K and below) could not compete with the efficacy of fluorescent sources and fixtures at the same colour temperatures.

// Phosphor technologyAll that began to change in 2010. LED source and fixture manufacturers can now achieve greater efficacies in the warmer colour temperatures. They can do this either by

combining phosphor white and red LEDs in a single package or array, or by using phosphor combinations specifically engineered to produce a greater amount of light toward the red end of the spectrum. The Philips EnduraLED 12 W replacement lamp is a commercially available version of the 10 W L Prize lamp submitted to the u.S. Department of Energy by Philips in 2009. It uses patented remote phosphor technology to produce warm white light indistinguishable from a standard 60 W incandescent lamp. A full range of other Philips lighting products that are especially suitable for office lighting also use this technology to produce highly efficient warm white LED light. These include the line of Calculite LED downlights from Philips Lightolier and the line of Fortimo LED spotlight, linear, and downlight modules.

// Improving energy efficiencyWhereas the efficacies of incandescent and fluorescent light sources have already reached

LEDTHE FuTuRE oF oFFICE LIGHTING

Advances in the LED lighting industry continue to remove the barriers to adopting LED lighting systems for office spaces.

Recent developments include the proliferation of suppliers and form factors, the availability of legitimate LED-based

replacements for horizontally lamped conventional downlights and T8 fluorescent lamps, tight integration with adaptive

control systems, and increased efficacy (measured in lumens per watt, or lm/W) in the warmer colour temperatures.

Jonathan Weinert, Philips Color Kinetics, Writer and editor 'LED Lighting Explained'

L E D L I G H T I N G E X P L A I N E D

their practical maximums, the energy efficiency of LED light sources will continue to increase as LED technology advances. At around 300 lm/W, the theoretical efficacy limit for LEDs is much higher than the limit for conventional sources. It’s unreasonable to expect LED light sources to reach this level in practice, especially when accounting for the losses in efficacy incurred by integrating LED sources into light modules and lighting fixtures, which can total 45% or more.

However, the potential does exist for LED lighting solutions to achieve levels of energy efficiency in excess of fluorescent sources, and many times greater than general service incandescent lamps. Today, for instance, Fortimo downlight and linear LED modules can deliver up to 100 lm/W in the warmer colour temperatures.

// LED in the officeFor office lighting, the energy efficiency of the entire lighting system is often a central

consideration and a major factor in the specification of solutions. Well-designed LED lighting systems not only offer low-maintenance operation and a useful source life of 50,000 hours or more, they can consume up to 85% less energy than conventional solutions when properly specified and deployed. LED lighting also lends itself to tight integration with digital control systems, occupancy sensors, manual dimming controls, photo sensors for daylight harvesting, bi-level switching, and other strategies for delivering the right level of light not only where it’s needed, but when.

As inherently digital devices, LED lighting systems can communicate operational and status data to software-based reporting and remote management systems for further potential reductions in management and maintenance costs. Although their claims are as yet unproven, some manufacturers of adaptive control systems estimate that digitally maintaining target lumen output levels throughout a system’s lifetime can increase energy efficiency by as much as 10% while increasing the useful life of the LED sources in the fixtures by under driving them.

// Eliminating overlightingTraditionally, conventional lighting systems ensure the minimum acceptable level of light output

(typically 70% of initial lumen output in general lighting applications) by overlighting spaces to account for lumen depreciation over time. by some estimates, there are over 100,000,000 m2 of overlit office space around the world. This represents both a massive waste of energy and a risk to the health and comfort of the millions of people who work in these spaces. overlighting is a significant source of discomfort glare, which can result from areas of intense brightness in the field of view—often luminous surfaces that reflect light, or the light sources themselves. Discomfort glare can cause annoyance, eye strain, headaches, and visual fatigue over long periods of exposure. by targeting the optimum light levels and digitally maintaining them throughout a system’s lifetime, LED-based lighting system can minimize discomfort glare while improving office workers’ visual acuity, mood, and even productivity.

// Minimizing glare and spillbecause of their physical features, many well-designed LED lighting fixtures excel at minimizing glare in general indoor illumination applications. because they are inherently directional, LED lighting fixtures emit a high percentage of their light output in a tight angle with relatively little spill light. Features such as secondary optics and rotating housings afford

further control over the direction and dispersion of light. ultra-low-profile fittings, native line-voltage operation that eliminates the need for external power supplies and ballasts, and innovative form factors allow the installation of LED lighting fixtures in discreet locations well out of direct view, removing many sources of glare in enclosed environments.

// The future looks brightThere is no longer any doubt that LED lighting systems can deliver the levels of light output, luminance, energy efficiency, and light quality that office lighting requires, at all colour temperatures. but in 2011, we’re only just beginning to see what LED lighting can do. by affording unprecedented levels of energy efficiency and completely new ways to deliver and use light, LED lighting has the potential to transform the way we work and live.




LED LIGHTING EXPLAINED

The digital LightSpec is the interactive version of LightSpec magazine. If you are interested in finding out more about the

subjects you find in this magazine, have a look at www.philips.com/lightspec. It offers an inspired view in the international

world of Lighting technology, applications, exciting innovations and talented personalities. There you will find movies,

interviews, links to relevant websites, the link to the LEDs in general lighting LinkedIn group and much more.

Focus on Ledmasterclass.comLED Technology is ready to take on fluorescent.This is the latest central question in the new discussion about LEDs in general lighting. on this new updated online platform, lighting professionals from around the world share their opinions and knowledge on LEDs in general lighting. Visit the website and share your opinion about the future of LEDs in general lighting!




LIGHTSPEC oNLINE

Published byPhilips oEM lighting solutions EMEA

For extra information or input [email protected]

Editorial teamJaouad L'oihmiAnnetta KelsoJeroen van Kempen

Designed bybovil DDb

online design byImago Reclame

Find us on LinkedIn LEDs in General Lighting

www.LEDmasterclass.comwww.philips.com/oEMwww.philips.com/lightspec

TALK To THE EXPERTS

// A future-proof solutionPerfect for indirect lighting or task lighting, the Fortimo LED LLM 1800/840 enjoys the benefits of remote phosphor. That means high energy efficiency, colour consistency and good colour rendition. It is a future-proof lighting solution, in which the lumen package, dimensions and colour consistency will remain the same when LED energy efficiency upgrades take place.

We’re pleased to announce the introduction of the new Fortimo LED LLM indoor system. It has the same familiar shape

as the current Fortimo LED LLM that’s used predominantly in outdoor lighting, but now with improved colour rendition

of Ra80 for use in Indoor applications. The Fortimo LED LLM Indoor module comes in 1,800 lm with a colour temperature

of 4,000 K and will work on a number of the existing Fortimo Indoor DLM drivers, with a new cable.

FoRTIMo LED LLMFoR INDooR LIGHTING

bRING THE ouTDooRS, INDooRS

// Twin drivers coming soonIn May 2011 there will also be additional Twin drivers available, which can drive 2 x Fortimo LED LLM Indoor modules in one luminaire.

For more information, please see the Philips Fortimo website, www.philips.com/fortimo


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