L Prize 60W Entry Field Assessments

Extensive field testing of the Philips 60-watt L Prize entry from June through October 2010 provided a wealth of independent, unbiased data and user feedback on its performance. In all, more than 1,300 samples of the Philips entry were installed in more than 40 sites across North America, representing a broad range of facility types, fixture types, tasks or areas to be illuminated, occupancies, hours of operation, use of controls (if any), and temperature conditions.

Assessments were done in collaboration with 14 L Prize partners, primarily utilities and energy efficiency organizations, who took measurements using existing lighting, then again after installing L Prize test samples; evaluated dimming performance; and gathered qualitative user/occupant survey responses. Partner reports were then submitted to DOE.

What did users and occupants think of the lighting? Feedback from all the qualitative surveys is summarized in these charts.

This table provides a summary of L Prize field assessments, and selected profiles are listed below.

The winning L Prize entry stood up to rigorous assessments in the field.

• Testing by Southern California Edison found that the L Prize lamp lived up to expectations in a luxury Palm Desert resort and spa.
• The Midwest Energy Efficiency Alliance documented a compelling business case for the L Prize lamp at the world's largest commercial building.
• Customers of Platte River Power Authority indicated satisfaction with key performance aspects of the Philips lamp.
• In assessments of color temperature across the field tests, two thirds of respondents judged the color of the L Prize lamp to be "just right."
• Progress Energy's L Prize lamp tests garnered praise for both resilience and low operating temperature in applications ranging from a hospital to a sports bar.