ThinkGrow Model-W 630W Horticulture LED Grow Light with full spectrum & separate Far-red channelThe Model W is designed for high PPFD cultivation practices. Full spectrum design covers each critical phase of crops from vegetative to flowering. An independent Far Red 730nm channel is designed to target Phytochrome Far Red in photomorphogenic lighting applications. Base on research, introducing far red light after the lights have been turned off can lengthen the dark period to encourage the flowering process. *Recommend introducing Far Red light