Date post: | 19-Jul-2015 |
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Technology |
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Traditional methods of producing light
The conventional way of producing light is by burning
From candle light to light bulb to HID.
Candle Light
Burning Wax
Incandescent/CFL
Burning Metal/GasHID/HPS
Burning Gas
• Burning process is not efficient
• Consumes high amount of energy to produce light
• Efficiency ~1%
What is light?
• Light is measured and expressed in lumen (light intensity) and lux (light
per square meter
• Quality of light is measured and expressed in Color Rendering Index (CRI)
How it started?
• Focus on better vision
• Understand how the eye works
• Understand how light works
The current standard (1931)- Lighting defined
The eye sensitivity curve V(λ) is based on measurement at photopic light
levels measured with a 2° view angle (foveal). CIE standard 1931.
The cones in the eye can see light from blue to deep red with the highest sensitivity in the
green/yellow area. One Watt of energy converted to light
at 100% efficiency results in 683 lumen.
-- During the day (at Photopic light
levels) our vision is the best at 555
nanometres
-- in the night (at scotopic light levels)
our visibility is best at 505
nanometres
Our eyes behave differently at night than during the day
Eye dynamics
• The human eye perceives light
different under varying intensities or
color
• A lux meter does not show that
• Vision and sight is not the same
under composed colors
• Leds allow spectral combinations for
optimal vision
• Science is questioning the lumen
standard
Source: http://adsabs.harvard.edu/abs/2009OptEL...5..265J
The Anatomy
• All eyes work the same around the world
• Cones are for color and day light = 5,000,000
• Rods are for motion and night vision = 120,000,000
11
The retina
• Best day sight at yellow-green (cones - 555 nm), night vision at blue-green (rods - 505
nm)
• With LEDs, light composition can be chosen more accurate than with conventional light
sources, for instance: green at 509 nm (with 2 nm deviation)
• Light with a green component gives best sight in street lighting at minimum illumination
levels: our visual perception mainly relies on our sensitive rods
Better Sight With Less Light!
Photopic / Daylight Vision Scotopic / Night Vision
Standard
street lamp
Match the light spectrum with the eye – Ellipz Lighting
• Light spectrum of Ellipz LED light follows the eye cuve which is shifting left from daylight vision to night
light vision.
• Standard Sodium lamps are peaking at 555nm which is good for the lux meter but gives poor visibility.
• Other Cool-White LED lamps (4000K and above) recreat photopic light with a peak at 555nm (good for
lux meter), but again give poor light due to a peak in the blue area due to the usage of 3p and 4p
phospors.
Color sensation through RED is intenisty and spectrum
depending
Ellipz SPD shows colors at 1 luxLow light levels no color vision
A simple comparison…… pole height 10mtrs, distance 25 mtrs
HPS 400wEllipz 120w
For 200mtrs of road this means the following energy consumption and savings:
HPS: 8 poles x 400w x 12hrs x 365 days = 14.016kWh
Ellipz: 8 x 120w x 12 x 365 = 4.204 kWh => 70% savings
Philippines Manila – Roxas boulevard
150 W sodium lampsEllipz 36 W lamps
Secondary roads in Holland – safety & reaction speed
*) pictures from former group company Lemnis Lighting BV
Morocco – Sale – safety 150w HPS
Ellipz 56w WhiteMoonlight HPS 150w
*) pictures from former group company Lemnis Lighting BV
Amsterdam Airport - Front 24W Ellipz Moonlight –
background 88W HPS
*) picture from former group company Lemnis Lighting BV
Surveillance cameras respond very good on Ellipz Led
High Pressure Sodium Ellipz Moonlight
Ellipz - Led and camera vision Schiphol Airport Amsterdam
*) pictures from former group company Lemnis Lighting BV
Surveillance cameras respond very good on Ellipz Led
Ellipz - Led and camera vision Schiphol Airport Amsterdam
*) pictures from former group company Lemnis Lighting BV
Very good camera recognition of men and objects
Pictures taken from actual monitors
HPS 70 Watt Ellipz Moonlight 24 Watt
Ellipz - Led and camera vision Schiphol Airport Amsterdam
*) pictures from former group company Lemnis Lighting BV
Ellipz Mesopic LED-light is adapting to the eye
•Human eye is more sensitive
to green towards blue at night
(Purkinje shift);
• Using yellow or white light
requires higher wattages to
provide good vision;
• For OUTDOOR: Ellipz
produces a green/blue light to
highten visibility at night at
low energy levels;
Something fundamentally wrong !
26
Light directives and standards are based on Photopic
lumen
This is a serious problem because our eyes behave totally
different at night than during daytime.
To benefit of the high sensitivity of the rods, light should have
the right spectral composition at different intensities. The goal is
more sight with less light.
Studies show that the ratio between Scotopic (night) en
Photopic (day) vision, the so called S/P ratio, is a base which
can be used to multiply the lumen with to express the real
light perception.
COMPETITORs White leds are based on blue chips with 3P or
4P phosphors to convert the blue light into white light with a
peak at 555 nm. In outdoor and most interior lighting the
maximal eye sensitivity is shifted towards 505 nm. Industrial
leds produce the lowest output at that wavelength.
Industry
spectrum
provides lowest
light levels at
505 where the
eye is most
sensitive at
night
Which side is lighter?
28 lux 6 lux
This is what the lux-meter reads/measures, but your eyes see
different due to night-light and day-light vision.
Some Results - Tunnel lighting
*) picture from former group company Lemnis Lighting BV
New Internationally acclaimed measurement – S/P-ratio
28 lux x S/P 0.63 =
176 lux x S/P 3.5
= 21
This is what your eyes sees and then it is correct.
Your eyes are not wrong, but measure with the
wrong and outdated standards.
New measurements are using S/P ratio to express the real light intensity!
*) picture from former group company Lemnis Lighting BV
Genting Highlands – Malaysia using S/P-ratio
Ellipz 56w WhiteMoonlight HPS 250w
7 lux x 3.2 = 22.4 20 lux x 0.63 = 12.6
A simple comparison…… pole height 10mtrs, distance 25 mtrs
HPS 400wEllipz 120w
For 200mtrs of road this means the following energy consumption and savings:
HPS: 8 poles x 400w x 12hrs x 365 days = 14.016kWh
Ellipz: 8 x 120w x 12 x 365 = 4.204 kWh => 70% savings
18 lux8 lux
Philippines Manila – Roxas boulevard
A simple comparison…… pole height 10mtrs, distance 25 mtrs
HPS 400wEllipz 120w
For 200mtrs of road this means the following energy consumption and savings:
HPS: 8 poles x 400w x 12hrs x 365 days = 14.016kWh
Ellipz: 8 x 120w x 12 x 365 = 4.204 kWh => 70% savings
Philippines Manila – Roxas boulevard using S/P-ratio
18 lux x 0.63 = 11.38 lux x 3.2 = 25.6
Global Standards in movement (1/2)
Industry focus is on More… More…. More Lm/W Lm/$
Eyes are asking for Better… Better… Better
See better with less energy (=energy saving)
How do we get better light?
By making the right spectral composition: high S/P ratio, best vision, lowest energy
consumption
What is happening to the standards?
IES TM 24-13: adjusting illumination measurement using S/P-ratio
CIE: working on the Mesopic Task-Force
Lites-Asia: twice annual forums discussing S/P-ratio for Asian implementation
SEMIcon SEA: making steps to advice and consult governments
The movement is there to accept the S/P-ratio as a valid
criteria for lighting design and master planning.
Global Standards in movement (2/2)
Industry and Countries are slowly accepting and adapting.
Panasonic Mesopic Light for Enhanced Security
*) copy of Panasonic brochure
Philippines has embraced S/P ratio in their program for National Road Lighting
Ellipz Mesopic light with S/P ratio of 2.7 (4000CCT) - 3.4 (6000CCT) is ideal at
night, but may raise question on absolute requirement of Photopic Lumen.
That is why Ellipz has developed a new Streetlighting product that meets the
criteria of 90lm/w, but with an S/P ratio of 2.0.
2 versions to answer to diverse global standards
type Ellipz SL1 and SL2 Ellipz SL3
Power (w) 25w/40w/60w/80w/120w 60w/75w/120w/150w
Photopic Lumen Typcial 36 - 40lm/w Typical 90 lm/w
Scotopic Lumen Typical 108 – 120lm/w Typical 180 lm/w
Chip composition Red+Green+Cyan+Blue
(NO phosphors)
Red+Green+Nitrates
Lifetime LM 90 @ 50,000hrs LM 90 @ 50,000hrs
Something else is also wrong ..... color recognition
High pressure sodium CRI 25Ellipz Eco White CRI 24
Color recognition using Mesopic Light indoor
10,000Watts <1,000Watts
CRI 25
CRI 24
*) pictures from former group company Lemnis Lighting BV
The tone control of light and CRI impact –Ellipz OUTDOOR Lighting
Cones composition to see colors:60% Red, 36% Green, 4% Blue
Ellipz spectral power distribution streetlight
peaking at 505Nm where the eye is most
sensitive
at night, low at 555Nm (daylight) and then
green and red to provide color recognition.
CRI 24
The eye needs colors, but the right colors at different light intensities: Ellipz uses RED+GREEN+CYAN to create white (MOON) light
In the center part of the retina the ‘sensors’ are the Cones and in the peripherie one uses the Rods. Cones are 96% RED+GREEN.
The retina
Other LEDEllipz LED OUTDOOR
Ellipz key differences in light-sources
Higher Power/Less Vision, Shorter life,Less vision
Most efficient LIGHT,LM maintenance, Distribution,
Vision (depth, contrast)
Red chip
Green
chip
Cyan chip
HPS (sodium)High power, Low vision,
Maintenance, Color, Safety
Blue chip +
phosphor
Hazards of blue light – out of the visual sphere => light dust
Blue cones in the eye are not in the central focus of the eye. Therefore blue light is not giving a sharp and detailed vision. An artistic project in Amsterdam had to be stopped creating dangerous situations. In addition the energy level of blue light is affecting the retina and may cause damage to the eye.
SENSITIVITY TO BLUE LIGHT & AGE
Human develop natural protection against excess blue light!
The older you get, the more blue are filtered!
Elderly people see less, specially of the blue light. Glare is therefore more applicable to elderly people and hence impacting road lighting.
Key issue with standard/conventional LED streetlights
Conventional LED streetlights are driven by many individual White LEDs with 3p+4p phosphors, each is approx 1+w
Limited energy savings: ie. 250HPS replaced by 180w or 150w.
Limited lifetime: higher heat output leading to single LEDs malfunction.
Faster degradation: due to higher heat output often a black line or fading in the center of the lamp.
Philips LED Streetlight Essential-line – specs (2012)
Weight:
100w = 13.2kg
140w = 14kg
180w = 15.8kgLumen maintenance
@ 50,000hrs = 70%
IP65 Class I
CRI 70
Philips NEW low-cost LED streetlights 140w (Korean OEM
supplier)
Individual White LEDs with
3p+4p phosphorsBig piece of
aluminum
for cooling
9 kgs
Philips NEW LED streetlights 60-140w (Korean OEM supplier)BRP 310 / 110W; 6000K CCT; Lumen 10200Lu; Average 92 Lu/W SP : 4000K - 1.5~1.6
; 6000K/1.9~2.0
Both ends of the pilot track are illuminated by 15 mtr high mast with 8 kW Sodium lamps.The side of the road is illuminated by strong spotlights from the Zoo.There is no dark zone were high power lights are invisible to support best mesopic vision
Location and view points
Malaysia – Ayer Keroh exit road to Malacca
Replacement impact
50
12mtr
400w HPS (6kg)
40-50mtr 40-50mtr
12mtr
180w LED (12-16kg)
40-50mtr 40-50mtr
Bad distribution
Solution = add more poles
51
12mtr
180w LED (12-16kg)
25 mtr 40-50mtr
Risk of weight, failure and cost of pole = 3 x cost of lamp
Advantage of colored LEDs
LONGER LIFETIME
Typical behaviour of LED material under equal
conditionsLumen depreciation
5mm epoxy LEDs at 20 mA
Ellipz uses
predominantly
R & G
>>Greatest
reliability (lumen
maintenance)
over long time
No IP issues
Matches eye
photoreceptors: mostly
red & green cones
(98% in total) for color
vision
>>
>>
Ellipz LED Technology Insight - lifetime
Ellipz Typical Replacement Table
TraditionalSON/HPS
Conventional LED
Ellipz LightingMesopic LED
Ellipz LightingPhotopic LED
70w 40w 25w n.a.
150w 80-100w 40w 60w
250w 100-120w 60w 75w
400w 160-180w 120w 150w
Pole distance4-5 x pole height
Pole distance2-3 pole height
Pole distance4-5 x pole height
Pole distance4-5 x pole height
Ellipz Lighting – Following the HUMAN EYE
In view of providing the most optimal light for the human eye, Ellipz Lighting has developed a 2nd generation of LED ighting technology (SL1, SL2). This is called Mesopic Light, which is combination of Scotopic (=Moon) and Photopic (=Sun) light.The so-called S/P ratio plays an important factor.
For strict roadlighting guidelines, Ellipz Lighting has also developed a hybrid version/photopic (SL3) with a lower S/P ratio, but still 25% better than average competition.
Ellipz Street Light – detailed specification overview (Mesopic)
Specifications Lemnis Streetlight 40W Lemnis Streetlight 60W Lemnis Streetlight 80W Lemnis Streetlight 120W
LED power in wattage (Lamp rated power) 40 60 80 120
Total system power in wattage* 45 66 88 132
Lumen output system 1,200 1,600 2,100 5,000
Nominal Lumen output (photopic) 1,700 2,000 3,000 4,100
S/P ratio 3.4 3.4 3.4 3.4
Nominal Perceived Lumen output (Mesopic)** 4,800 6,300 8,400 12,500
Efficacy lm/W (Photopic) 37.8 30.3 34.1 31.1
Efficacy lm/W (Mesopic) 106.7 95.5 95.5 94.7
Weight Kg 5.2 5.2 7.2 7.2
Dimensions (L x H x W) mm 539 x 260 x 145 539 x 260 x 145 734 x 260 x 145 734 x 260 x 145
Burning Hours life time
Lumen output minimum at 90%
System voltage
Voltage fluctuation tolerance
Power factor
Dimmable
Operating ambient temperatures
Ventilation / cooling mechanism
Color temperature in CCT
Vertical light distribution
Lateral light distribution
IP Rating
IK Rating
Direct or Indirect lighting
Usage of indirect lighting technology
Cover type to protect LEDs
Housing
Color All colors possible, standard RAL 7035
>70% lumen output at 80,000hrs
-40C⁰ - +70C⁰
IK 08
Indirect, usage of patented reflectors
Satinized mirror reflector for max lifetime
Yes, tempered glass
die-casted aluminimum
Channelled convection and/or Alu 47 gr/W
6000K and 4000K
yes, 4.5h-6h
Type I, width=1.5h
IP 66
L90 50,000
100/240v 50/60Hz
90 -305V
0.95
OPTIONAL 1-10VDC
Ellipz Streetlight 40w Ellipz Streetlight 60w Ellipz Streetlight 80w Ellipz Streetlight 120w SL1 / SL2
SL1 Series SL1 40W SL1 25W
CCT 4000K / 6000K 4000K / 6000K
Input Voltage (V) 100/230/277 100/230/277
System Power (W) 45W typical 29W typical
PF 0.95 0.95
Photopic Lumen (lm) *1700 *1150
Efficacy (lm/W) *38 *39
SP Ratio 2.5 / 3.4 2.5 / 3.4
Lifetime L85B15 / L70B50 50,000 / 80,000 hrs 50,000 / 80,000 hrs
LS Ellipz LS-15W Ellipz LS-8W
Size (mm) 539 x 260 x 145 mm 539 x 260 x 145 mm
IP IP66 IP66
Certification TUV+CB, LM79 TUV+CB, LM79
Ellipz SL1 Street Lights LOW power range (Mesopic)*Mesopic is combination of scotopic and photopic light. S/P raio of 2.5 means 2.5 more scotopic light than photopic. Impact on actual measured Lm.
Ellipz SL3 Street Lights (Spectral Enhanced versions)
SL3 Series SL3 60w - 75W SL3 120 - 150W
CCT 4000K / 6000K 4000K / 6000K
Input Voltage (V) 100/230/277 100/230/277
System Power (W) 75W typical 150W typical
PF 0.95 0.95
Photopic Lumen (lm) 6,375 (75w) 12,780 (150w)
Efficacy (lm/W) 85 85
SP Ratio 2.0 / 2.2 *2.0 / 2.2
CRI >90 >90
Lifetime L85B15 / L70B50 50,000 / 80,000 hrs 50,000 / 80,000 hrs
LS Ellipz S5-15W Ellipz S5-15W
Size (mm) 539 x 260 x 145 mm 539 x 260 x 145 mm
IP IP66 IP66
Certification TUV+CB, LM79, LM80 TUV+CB, LM79, LM80
Photopic versionsS/P ratio 2.0
Patented light distribution technology
66
Through the asymmetric optics,
different illuminated zones on the
street are realized. The zones
overlap each other resulting in an
even light distribution. The fixture
illuminates the sidewalk and
facade in such a way causing no
disturbance in the surrounding
houses
Ellipz key USPs - OUTDOOR
USP Ellipz Other standard LED
Power (w) Most efficient due to S/P ratio 2.5-3.2 efficiency (120w)
Higher Power due to lower S/P ratio (180w, 30% less efficient)
Vision Better, transparent, due higher scotopic light spectrum
Blue LEDs, blur vision
Distribution Higher due to reflector Direct light, intense, need more poles
Glare Lowest in the industry(G-06)
High, specially in rain & fog
Lifetime Long as NO phosphors(LM 90 @ 50,000hrs)
Questionable due to Blue LEDs with phosphors
Ellipz Outdoor vs competition
Where does Ellipz excels vs market:
1. Optics/Reflector vs directional light• better distribution• lowest glare factor
2. No usage of phosphors• longer lifetime• less degradation
3. Absolute weight of product (>50% less than Philips)• lower cost • lower demand on pole • easy retrofit, safer for risk of falling down!
4. Better heat management • lower degradation : 90% at 50,000hrs
5. Overall more efficient through unique spectral distribution of mixing red/green LEDs leading to S/P ratio providing best vision at night
Ellipz 120w
ABOUT Ellipz Lighting
Founded by the 2 great grandsons of late PHILIPS Founder.- Frans Otten (Chairman / Ellipz Lighting)- Warner PhilipsAnd inventor of Ellipz Lighting- John Rooijmans (CTO / Ellipz Lighting)
Originated in Holland / EuropeHeadquartered in Singapore / Asia
AccreditedEllipz Technology is accredited by world organizations and has received endorsement from eg Mr. Bill Clinton, Sir Tony Blair, Sir Richard Brenson, and many more.
Ellipz LightingCustomers