| The US Department of Energy concluded that all 38 models of PAR38 lamps tested surpass halogen lamps in terms of energy efficiency. Subjective testing of some models by IES members determined that single emitters performed best. The US Department of Energy (DOE) has published two reports on LED-based
PAR38 retrofit lamps including an updated quantitative Caliper report
on the lamps and a subjective report on light quality in which lighting
designers rated various products. The Caliper report is an addendum to
Report 20 in the DOE Caliper series that was initially issued in 2012,
and the addendum covers six additional lamps and three additional
benchmarks focused on the performance characteristics of the LEDs. The
subjective report has been called Caliper 20.1 and covers the evaluation
of beam quality, shadow quality, and color quality by lighting
professionals. |
No comments: