people really need to know that BRIDGELUX DOES NOT MAKE LEDS SUITABLE FOR GROW LIGHTS the bridgelux leds that are used in all growlights are manufactured in china and only use the interior chip manufactured by bridgelux, they ARE NOT top of the line they are bought for pennies same thing with epistar, epistar only makes 3 w leds in the blue wavelength. not to say they arent good they are fine you wont really find anything better in grow lights besides CREE but even cree in terms of top companies are at the bottom performance wise, they are more practical and focus more on being cost effective. The top company id say is EVERLIGHT there leds cost almost 5 bux a piece which is why they are not used but they have a life of 100000 hours twice that of the leds currently used in grow lights.