Cree claims R&D record for white LED: 254 lm/Watt - PowerSource | Blog on

@Cree claims R&D record for white #LED : 254 lm/Watt

Cree says that the R&D version of the white LED’s efficacy was measured at 254 lumens per watt, at a correlated color temperature of 4408 K at standard room temperature, 350 mA. In the past Cree has said it takes about a year for the R&D version of a device to go into generally available production quantities, so we can look for a commercial version in Q2 2012 2013. Cree’s previous record was 231 lm/Watt. The device is built on a silicon carbide-based wafer technology that features advancements in LED chip architecture and phosphor, as well as a new LED package design; Cree calls this is its SC3 Technology Platform and uses it for its existing XLamp product lines. At a time when other LED makers are pursuing new wafer materials for high-power LEDS (for example, OSRAM with GaN-on-silicon , start-up Soraa with GaN-on-GaN ) Cree appears to be quite content with its flagship s...

Full article: http://www.edn.com/blog/PowerSource/41719-Cree_claims_R_D...