This report for the U.S. Department of Energy’s solid state lighting technology division came out in June 2020. Lighting application efficiency (LAE) describes the efficient delivery of light from the light source to the lighted task and is viewed as a new frontier—increasing energy savings with solid-state lighting (SSL) technologies. A LAE framework that takes into account light source efficiency, optical delivery efficiency, spectral efficiency, and intensity effectiveness is discussed. This research focuses on a sampling of the available SSL products that can be broadly defined as having modified spectral output; the method of spectra modification has a significant impact on light source efficiency and long-term optical delivery and spectral efficiencies. Enhanced optical performance came at the cost of reduced light source efficiency for the lamps and light engines examined in this study.
Key words: lighting controls/systems, energy management, consumer electronics, protocols/standards