... 430~440nm,450~475nm 620~630nm, 650~660nm, and white , we research and find that , Red colour helpful ... wattageOur led chip import from Taiwan Epistar(Red,Blue,White),OPTOTECH(IR) Item No. as bellowRed No. ES ... IR: ED-640IRS(730nm)Blue/White No.ES-CABLV45H(450~475nm,Cool/warm white),Blue led chip with silver powder ... chip size for grow light Red:42mil, Blue/White:45mil also we call these are 3watt ledAll ...