Will a higher wattage hps give better yeilds? I have an original 4x4x7 hydrohut with a 400 watter. Would a 600 or a 1000 watter give me bigger colas and higher yields? I know plants will onlytake in so much light, but I never get nice fat colas..... ww, trainwreck, purple urkel, and nl#5 x haze.... none with an impressive cola!