DOE Study Examines Age-Related Changes in LED Device Efficiency and Optical Performance - Energy Watch News


DOE Study Examines Age-Related Changes in LED Device Efficiency and Optical Performance

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. The framework for LAE that is proposed by the U.S. Department of Energy (DOE) consists of four major elements: light source efficiency, optical delivery efficiency, spectral efficiency, and intensity effectiveness. This report focuses on a sampling of the available SSL products that can be broadly defined as having modified spectral output because the method of spectra modification has a significant impact on light source efficiency and long-term optical delivery and spectral efficiencies. This report focused on the changes in light source, optical delivery, and spectral efficiencies that occur during aging of SSL devices. https://www.energy.gov/sites/prod/files/2020/08/f77/ssl-rti-device-efficiency-jun2020.pdf

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