300W Cree LED CXB3070 Powered Grow Light (6 COB) Cree CXB3070 LEDs provide most efficient PAR output per watt of any LED grow light! Optimized spectrum for maximum photosynthetic response Increases yield, decreases electricity use, and shortens time to harvest 600W HPS replacement with 4ft x 3ft coverage at 16" height COMPLETE 5 YEAR WARRANTY plus our exclusive 180 DAY SATISFACTION OR RETURN GUARANTEE