1 cfl per plant is gd, if you have daylight spectrum (lots of blue and red spec) that will alow u to veg and flower under one lite, wish i could build a proper grow room, start ova, get lots of cfls, get 1000 watt hps, get mylar all over, proper heatin and water, correct watering technics... Man all my research and i still didnt do it rite!