High-power LED boosts lumens-per-watt

CREE XLamp XP-L2 angle high-power LED provides up to 7% more lumens and 15 percent higher lumens-per-watt (LPW) than its previous generation in the proven 3.45 mm x 3.45 mm XP package. The high-density discrete LEDs improve the performance of existing lighting designs with an easy drop-in upgrade, while reducing the size and cost of new designs and creates innovative new solutions to address a wide range of applications.  http://www.cree.com