Cree sets new R&D white-light LED luminous-efficacy record of 254 lumens per watt

April 26, 2012

Durham, NC--LED maker Cree, Inc. (Nasdaq: CREE) has created an experimental white-light LED that has a luminous efficacy of 254 lumens per watt.

John Wallace

An LED streetlight designed and produced by Cree. This streetlight has a system efficiency of up to 100 lumens per watt; Cree has experimentally demonstrated a 254 lumen-per-watt white-light LED in the lab that could further raise the efficiency of streetlights and other LED illuminators.

Durham, NC--LED maker Cree, Inc. (Nasdaq: CREE) has created an experimental white-light LED that has a luminous efficacy of 254 lumens per watt. This figure exceeds Cree’s previous R&D industry record of 231 lumens per watt.

Elements of Cree’s SC³ technology platform (which is commercially available in Cree's XLamp LEDs) aided in achieving the R&D result, says Cree. The SC³ technology platform includes advanced silicon carbide technology, advances in LED chip architecture and phosphors, and a new package design.

Cree reports that the LED efficacy was measured at a correlated color temperature of 4408 K at standard room temperature and an electrical current of 350 mA.

About the Author

John Wallace | Senior Technical Editor (1998-2022)

John Wallace was with Laser Focus World for nearly 25 years, retiring in late June 2022. He obtained a bachelor's degree in mechanical engineering and physics at Rutgers University and a master's in optical engineering at the University of Rochester. Before becoming an editor, John worked as an engineer at RCA, Exxon, Eastman Kodak, and GCA Corporation.