Lighting Update: LEDs, OLEDs, and Controls

www.esource.com

Lighting Update LEDs, OLEDs, and Controls

Senior Advisor, E Source

E Source Forum 2014 September 29–October 2, 2014

Ira Krepchin

www.esource.com || © 2014 E Source 2

Troffers Are Ubiquitous

The most common fixture: Operate 10.5 hours/day Draw 25 to 113 watts Contribute to peak load 42 percent of lighting energy Converting all to LEDs saves the

equivalent of 27 million homes Source: US Department of Energy (DOE), http://apps1.eere.energy.gov/buildings/publications/pdfs/ssl/caliper_21_t8.pdf

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Lots of LED Troffer Choices

Tubes Use existing ballasts Tubular kits Tubes and drivers Bypass ballasts Driver may be internal or external May or may not use existing

sockets Retrofit kits Use existing housing; may include

lenses Luminaires

Source: LIthonia


LED Tubes, Existing Ballast

Pros Lowest-cost LED Easy to install; no rewiring Considerations Persistence Life and efficacy similar to HP T8s Need to confirm ballast compatibility and

light distribution Ballast life and losses Check condition of lenses or louvers Thermal management challenges

Source: Cree


Tubular Retrofit Kits

Pros Moderately easy to install Less expensive than troffers and full kits

Considerations Life and efficacy similar to HP T8s Installation requires electrician Need to check light distribution Check condition of lenses or louvers Apply labels to inform maintenance

Source: Cree


LED Retrofit Kits

Pros More efficient than HP T8s Optics designed for LEDs Easier to install than full troffers

Considerations More costly than HP T8s, LED tubes Need to verify physical fit and light

distribution Ensure UL is preserved

Source: LG Electronics


LED Luminaires

Pros Most efficient Luminaires designed for LEDs Opportunity for redesign of

lighting layout; improved quality

Longest warranties Considerations Most expensive Look for modularity Products should be UL listed


DOE Recommendations for LED Tubes Findings from the recent DOE study on LED Linear

Lamps and Troffer Lighting: Choose carefully: good and bad products out there Tube performance will vary with fixture type Consider retrofit kits and high-performance fluorescents LED T8s may be cost effective: high electricity rates, long

hours, low installation costs Do a mock-up or pilot

http://www1.eere.energy.gov/buildings/ssl/application-troffer.html



Lookin’ for Tubes in All the Wrong Places?

Acrylic lens: good chance

High-performance troffer: fairly good chance

Volumetric troffer: good chance

Parabolic louver: marginal

Recessed indirect: no


LED Tubes Are Getting Better, But…

Metric High-performance

T8 Philips InstantFit

LED Cree T8 series

LG retrofit kit

CRI 80s (R9~10) 85 (R9~20) 90 (R9~50) 82

Life (hours) 24,000 to 75,000 40,000 50,000 50,000

Efficacy (lm/W) 98 100 (95 to 116) 100 130

Cost ($) 5 24 to 39 30 130 to 175

Dimmable Yes No Yes Yes

Ballast compatibility

All IS; some PS; no dimming (yet)

90% of IS; PS;

dimmable

NA

Notes: LEDs and fluorescents use different definitions of “life. CRI = color rendering index; IS = instant start; lm = lumens; NA = not applicable; PS = programmed start; W = watt.

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LED Troffer References

LED Applications: Tubes and Troffers, E Source, TAS-RB-79 (2014)

LED Linear Lamps and Troffer Lighting, US Department of Energy (2014)

Tubular LED Guide (PDF), Sacramento Municipal Utility District (2014)

A Guide to LED Retrofit Options for Linear Fluorescent Luminaires, California Lighting Technology Center (2014)

http://www.esource.com/members/TAS-RB-79/Research-Brief/LED-Tubes-Troffers


https://www.smud.org/en/business/education-safety/workshops-and-training/documents/Tublar-LED-Lighting-Guide.pdf

http://cltc.ucdavis.edu/article/led-retrofit-options-for-linear-fluorescent-luminaires

http://cltc.ucdavis.edu/article/led-retrofit-options-for-linear-fluorescent-luminaires


Prescriptive Rebates for LED Tubes

From E Source DSMdat 8 prescriptive programs for LED

tubes Rebate per tube: $4 to $10; some

give more for T12 All tubes/fixture $18 to $90 for 4-lamp Requirements DesignLights Consortium listing Same lumen output and distribution Labels must be displayed Save more than 25 percent for T8 and

more than 50 percent for T12

Source: Philips


Natural Allies: LEDs and Controls

LEDs are easier to control than high-intensity discharge (HID) or fluorescent Instant response Insensitive to frequent on/off cycling Easy to dim; dimming may increase lamp life Check for compatibility; there have been some problems with

incandescent dimming

Can change color temperature Mimic incandescent dimming Health and productivity impacts


LED High-Bay Case Study: Ace Hardware Project with Pacific Gas and Electric, the Emerging

Technologies Coordinating Council, and Digital Lumens Baseline: metal halide; no

automatic controls Installed: intelligent LED

fixtures Networked, software, sensors, wireless communications

93 percent energy savings (50 percent light source, 43 percent controls) 3.6-year payback

Source: Digital Lumens


Challenges with Controls State of the art Advanced controls: sensors, graphical user interfaces

(GUIs), flexible grouping, networked; Required by 90.1, Title 24, LEED

Marginal use (for example, less than 0.5 percent in northeast utility programs)

Challenges: many systems still don’t work right Lack of electrician training Poor documentation Lack of standards Hard to predict savings Harder to justify because LEDs reduce energy to lower

levels to begin with


Moving Forward with Controls

Green Light New York: 25 percent could use daylight; working with Lawrence Berkeley National Laboratory on some demos; www.greenlightny.org Northeast Energy Efficiency

Partnerships: Commercial Advanced Lighting Controls (CALC) Initiative Education Program offerings Savings calculator Qualified products list Demonstration projects

http://www.greenlightny.org/


Smart Bulbs, Smart Apps

Q: How do you make a profit with a bulb that lasts a lifetime? A: Make it a consumer electronics item or a service Smart bulbs For example, hue from Philips:

iPhone control, networked, color- changing, lots of applications

Demand-response applications? Others: GE, Osram with Comcast,

GreenWave Reality, Lumen Bluetooth, Bluetooth Bulb, LIFX, TCP

Source: Philips


Philips hue

www.youtube.com/watch?v=RVGDckDhXEM

http://www.youtube.com/watch?v=RVGDckDhXEM


OLED Are Coming Organic LED (OLED) features: Thin, flat, flexible, diffuse New possibilities: wearable lights, illuminated wallpaper

A few years behind LEDs The US Department of Energy

reports prototype at 131 lm/w, L50 = 55,000 hours

Osram prediction Mainstream for autos within 2 years Performance parity by 2016 Price parity by 2020

Market report—$6.7 billion by 2023 Source: Acuity


Source: Acuity

OLEDs Set the Mood


Source: Acuity

OLEDs Are Friendly


Source: LG Display

OLEDs Are Flexible


Ira Krepchin Senior Advisor, E Source 617-739-6723 [email protected]

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