Thanx for the input! I rebuilt the box 2x3x6. Somebody said 400 watt hps, someone else said 250, I'll prolly go with the 250 so save on ventilation issues, I already got some 40watt T12 4' fluorescent tube lights, 3 of them to be mounted on the walls,1 each side and 1 at the back for, are t12's to big?