I have found that flouracents are the way to go! A normal 100 watt bulb pulls 100 watts and puts out 1800 lumens. Well a flouracent 100 watt puts out 1800 lumens and only pulls 26 watts. Using a 2x2 closet you would usually use a 400 watt hps. Well I tested the lights myself and put 4 100 watt...