Durham, N.C. — Cree, Inc. has claimed another LED milestone with the demonstration of 303 lumens per watt from a white high power LED, aimed at producing smaller and lower cost lighting solutions. This surpasses Cree’s previous R&D industry best of 276 lumens per watt announced over a year ago.
LED efficacy was measured at 303 lumens per watt, at a correlated color temperature of 5150K and 350 mA, said Cree. Standard room temperature was used to achieve the results. "Pushing the boundaries of LED performance is critical to enhancing LED lighting designs and this 303 lumens-per-watt result will enable more cost-effective lighting solutions," said John Edmond, Cree co-founder and director of advanced optoelectronics, in a statement.
“This is truly an impressive accomplishment. Achieving this level of LED efficacy amplifies the potential for the solid-state lighting industry to deliver smaller, lower-cost lighting solutions, and even larger-than-expected energy savings,” said Steven DenBaars, professor and co-director, Solid State Lighting and EnergyCenter, University of California, Santa Barbara, in a statement.
Cree also continues to improve upon existing product designs. One recent example is the introduction of the high-density XLamp XB-H LED series. Touted as the brightest discrete in Cree’s high-density (HD) class of LEDs, these LEDs are said to deliver a breakthrough combination of lumen output and efficacy in a small package.
Cree said the XB-H LED packs the lighting-class performance of the XP-G2 LED into a 50 percent smaller package. The LEDs supply more than 500 lumens at 1.5A, 25º C in a 2.45 mm2 package. This allows luminaires that use the same size footprint XB-D LED to triple their light output at the same efficacy, according to the company.
The XLamp XB-H LED is available in color temperatures ranging from 2700K to 8300K and CRI options of 70, 80, 85 and 90. Binned at 700 mA, 85°C, the XB-H LED delivers up to 499 lumens at 5W, 85°C. They also offer long L70 lifetimes at both high temperature and current. They are compatible with most optics designed for the Cree XP family of LEDs, allowing lighting manufacturers to leverage the optics of existing lighting designs and improve time to market, said Cree. Product samples and production quantities are available.