1. 1 Energy Star LED Recessed Downlights: First Look at Deemed Savings and Cost- Effectiveness for Residential Retrofit Applications January 8, 2008

2. 2 Purpose of “First Look” Estimate deemed savings for “best” residential retrofit applications –High hours of use –CFL replacement not appropriate (e.g., dimming) –Appropriate LED product is commercially available (e.g., LR6 medium base BR or PAR replacement lamp). Assess cost-effectiveness of LED

3. 3 Input Assumptions – Hours of Use Data Sources Sources: Lighting Efficiency Technology Report, Vol 1. Appendix 5, page 80. California Baseline. Prepared for the CEC, Sept 1999. Lighting Efficiency Technology Report, Vol 1, page 31, Figure 19. California Baseline. Prepared for the CEC, Sept 1999. Baseline Residential Lighting Energy Use Study Final Report Prepared by Lyle S. Tribwell and David I. Lerman Tacoma Public Bonneville Power Administration May 1996 Table 5-9, p 40. U.S. Lighting Market Characterization Volume I: National Lighting Inventory and Energy Consumption Estimate Final Report Prepared by Navigant Consulting, Inc.for U.S. Department of Energy Office of Energy Efficiency and Renewable Energy

4. 4 Input Assumptions – Hours of Use Data

5. Input Assumptions – Energy, Lifetime & Cost Data Lamp65 W BR30 Incandescent 50 W PAR30 Halogen 14 W CFL12 W LED Wattage65501412 Lumen Output610660650 Average Rated Life (hrs)20002500800025000 Annual Energy Use (kWh) Kitchen83641815 Hall433398 Bath423398 Retail Price*$2.59$4.91$8.99$129.95 Retail Price (bulk)*$1.59$4.56$5.99$100.00

6. 6 Input Assumptions – LED Savings

7. 7 Input Assumptions – LED Savings Adjusted for Space Conditioning Interaction

8. 8 First Look Results – Not Ready for Prime Time Until Prices Drop by 50%