2x300 watt ;-) View media item 6319I grow with 30 watts of LED light per square foot of floor space with 4 4' T5s for side lighting. If you can afford it use 40-50 watts per foot of LED light. I have grown as many as five plants in 3 gal air pots and 3 in 5 gal pots, but the overcrowding is bad.