any light u add will help id use at the least 4 32-55 watt cfl 6500 color for veg (8400-12500 lumens)u want more for bloom maybe 4-8 68 watt 2700 color. a plant with a prof bulb gets 55,000 lumens for a 400 watt and a 1000 watt gives 110,000 lumens so the less u use the lower the yield. a good chart is .5 grams per real watt used not equivalent, a 23 watt cfl gives 23 watts not 100