... light ,it can also function as a dimmer.2) CREE chip in the corss , make the light penetration greater.3 channels ... .5) Any ratio could be customized,We suggest Red & Blue,8:1, 7:2,and7:1:1,Cocktail ligt of Red ... used by plants.But for traditional HPS or MH, just 8-10% lights can be used. Shipping:1,We provide international ...