News

21 April 2009

 

Cree claims smallest ANSI-compliant warm/neutral-white LED bins

Claiming to be the only LED maker to offer lighting-class LEDs in the entire ANSI color space, Cree Inc of Durham, NC, USA has announced expanded binning for its XLamp XP LED family.

The firm is sub-binning its entire warm/neutral-white color space for XLamp XP-E and XP-C LEDs into what it reckons is the industry’s smallest warm-white bins, now available to order with standard lead times. Cree has also standardized two cool-white bins for the XLamp XP LED family covering the ANSI-defined 5700-6500K color space, which is primarily used for outdoor lighting.

“By offering smaller bins—that are more in line with traditional lighting expectations—we can better serve our customers’ lighting-class LED needs,” says Paul Thieken, marketing director LED components. “These new XLamp XP LED bins are 75% smaller than before, allowing customers better control, color and consistency,” he adds.

“Noticeable color differences among similar white-light sources could reduce the visual aesthetics of the lighted environment,” says Dr Nadarajah Narendran, director of research at Rensselaer Polytechnic Institute’s Lighting Research Center. “Our previous research, sponsored by ASSIST, has shown that smaller bins offer improved color consistency among LED lighting fixtures.”

The ANSI C78.377-2008 standard outlines eight quadrangles on the black-body locus, covering the cool-white to warm-white color space. The US Department of Energy cites this ANSI standard in its ENERGY STAR Solid State Lighting 1.1 criteria.

Cree adopted the proposed ANSI-color space for warm and neutral white in 2007, nearly a year before the C78.377 standard was formally published. Upon publication, Cree began offering four sub-bins within each ANSI quadrangle. With the latest announcement, each warm/neutral ANSI quadrangle is sub-divided into 16 discrete bins—each 75% smaller than previously offered and 94% smaller than the ANSI C78.377-standard.

See related item:

Cree announces volume availability of brightest lighting-class LEDs

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