This report is the final market progress evaluation report (MPER) of the Northwest Energy Efficiency Alliance’s (the Alliance’s) ENERGY STAR Residential Lighting Program (Lighting Program). The Lighting Program promotes residential lighting products that meet ENERGY STAR technical lighting specifications and are labeled with the ENERGY STAR logo. Targeted lighting technologies include screw-based compact fluorescent lamps (CFLs), indoor and outdoor fixtures, and portable lamps. The program is part of an ongoing effort to transform the residential lighting market in the Pacific Northwest. It is implemented by ECOS Consulting, Inc. (ECOS) over the four-state Alliance territory. This incarnation of the Lighting Program ended in December 2003, but Alliance residential lighting program efforts are continuing through the Residential Sector Initiative, which formally began in March 2004