1 flo light for veg should be good but you'll need a lot more light for flowering a mh or hps would be good. I think you"ll at lest a 400 watt if you doing 4 plants. I picked up a 400 watt hps for $100 on ebay.I use to use flo for both stages but the yeild sucks small buds. Now with my hps i get...