Setting up for my first grow. The makers of the CFL's I have claim 1600 lumens per 23 watt bulb. I have decided to use 9 for a 20 cubic foot closet. That makes for 14,000 lumens at only 207 watts. Now for most of the time the grow space will be about 10 cubic feet since the light will be closer to the plants. One thing I have thought about that does not seem to be generally considered is the size of the reflector. I figure by custom fabricating to be the largest possible area would increase lumen efficiency by maximizing reflection back toward the plant. Sound good? I am a total noob.