Copyright © 2009 Cree, Inc. pg. 1
Indoor Solid State Lighting
Copyright © 2009 Cree, Inc. pg. 2
Fixture Efficacy10 lm/W17 lm/W
IncandCoefficient of Utilization
58%x =
* Including loss for thermal equilibrium @ Tj = 65°C
Coefficient of Utilization 90%Driver Efficiency 91%Thermal Equilibrium 88%*
75 lm/W =
XLampx Fixture Efficacy
54 lm/W
Fixture Efficacy35 lm/W60 lm/W
CFLCoefficient of Utilization
58%x =
WARM WHITE
CA Title 24
xx
5x more Efficient than Incandescent, 2X CFL…
Copyright © 2009 Cree, Inc. pg. 3
Indoor Applications
• Different requirements than outdoor– Warm White Color
Temperature (~3000K) required
– High CRI (>80) – Lamp maintenance not
a driving factor– High style content– Focus on energy, green– Different market
channels, cost expectations (consumer product)
Yes, these are LED!
Copyright © 2009 Cree, Inc. pg. 4
Successful Installations
• Anywhere Downlights are Used…– And High Efficacy, Excellent
Color, and Longevity are Required
• Retrofit and New Construction– Multi-family– Hotels– Restaurants– Offices– Schools– Universities– Retail– Single-Family Residences
Copyright © 2009 Cree, Inc. pg. 5
Residential Lighting
Cree LR6
Copyright © 2009 Cree, Inc. pg. 7
Benefits Beyond Lighting Being Quantified
Cree Lighting LRP38 – Total Wattage = 36W; CRI = 93
Ceramic Metal Halide – Total Wattage = 158W; CRI = [email protected]
Copyright © 2009 Cree, Inc. pg. 8
Yum Brands
Courtesy of Derry Berrigan, DBLD
• 81% energy reduction from baseline store
• 95% of lighting is high-performance LEDs
Copyright © 2009 Cree, Inc. pg. 9
Sheraton Hotel – Greensboro, NC
• 400 LR6 recessed down lights – 2000 planned
• Up to 82% energy savings
Copyright © 2009 Cree, Inc. pg. 10
– Indoor hibay– Indoor fluorescent
• Still some work to be done (0-3 years)– Higher wattage roadway– Replacement bulbs
• Education is key– DOE Energy Star and other quality programs will
help
Summary
– LED Fixture design learning curve
• All the major pieces are in place:– Standards– Performance
– Lower wattage street lights
– Indoor down lights– Freezer cases/displays
• LEDs save real energy and make good economic sense in many important applications now:– Parking decks, canopies– Hazardous work areas– Pedestrian, bollards, etc.
Copyright © 2009 Cree, Inc. pg. 11
