Thanks for the helpfull info ^_^ I just got back from the Lowes in town and did some pricing. I also checked out the very helpful lighting FAQ you linked. I calculated the total square footage of the grow tent to be 552.25 square inches, or roughly 3.8 square feet. A 150 watt HPS light would proves approximatly 3700 lumens per square foot. But from what I have read, you only use this bulb when you switch the plant to 12/12 and induce flowering, correct? I would need a different type of bulb for promting vegetation. Please correct me if I am wrong.