i hav grown tomatoes in hydro with cfl they were flowering and producing tomatoes at 8 in tall,was using a 3x3 with mylar walls had 6 13w 3000k and 6 23w6500k bulbs on 18 6 light cycles but the heat was awful plants stayed less than a foot tall. till i put them in a ebb flow with 400w hps shot to 4 ft in two weeks. with 12 12 light cycles