Well im doing a cabinet grow.

23" High(but there's a removable shelf 11 1/2 " )
42" Length
12" Wide

Right now im using the top shelf with the two 20 watt fluor tubes, i screwed the fixture in to the top of the cabinet, and i have them between 1- 2 inches of that light.

It's all white walled right now. You don't think that would be enough? i'm only looking to do 4-6 right now (more are sprouting, but since im using bad seed im gonna *weed* out the weakest most likely).

Each of those tubes are suppose to be 1075 lums so i was hoping 2150 would be enough with the mylar on the walls.

I'm going to work out a vent system soon, it's not that hot in there currently so i have a little time.

Let me know what you think.