Lighting Update: LEDs, OLEDs, and Controls
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Transcript of 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
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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
© E Source
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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
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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
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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
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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
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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
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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
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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
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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.
© E Source
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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)
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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
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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
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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
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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
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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
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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
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Philips hue
www.youtube.com/watch?v=RVGDckDhXEM
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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
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Source: Acuity
OLEDs Set the Mood
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Source: Acuity
OLEDs Are Friendly
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Source: LG Display
OLEDs Are Flexible
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Ira Krepchin Senior Advisor, E Source 617-739-6723 [email protected]
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