2013 CREE XBD SERIES come out overwhelmingly with the latest illuminant The minimum size in lighting-class LED industry The new LED products based on silicon carbide technology Special design for general lighting &direction lighting application cool white illuminant light efficiency is up to 136LM/W Brightness is unchanged under the temperature 85℃ Product features : High luminous efficiency and reliability adopting CREE-XB-D and EPISTAR chips 360 degree emitting with sixteen piece led chips Designed with wide-range voltage ,constant current control ,anti-interference circuit Exquisite aesthetic and heat dissipation efficient with Knurled aluminum parts