get the 600W and make shure to get lots o fans and a cooltube!:jointsmile:
Ganjninja Reviewed by Ganjninja on . this is a realy good question whats better? a 600w hps and use a conversion mh bulb for veg ...of just get a 400w and switch hps and mh bulbs. for 4-6 sea of green plants in a 4'X'4X7' grow tent. 1000 watt is to much electricity for me and heat. these are lumatek digital ballasts. Rating: 5