My flowering room will span about an 8' x 8' area. My original thought was to use a dual 600w setup. I would purchase a dual system that includes two 600w HPS lamp fixtures and one ballast that supports 1200w. These two lamps would be on a light mover to span the area back and forth. My first concern with the light mover is that somehow the plans won't get the light they need when the lamps have moved to the other end of the area. Sure, the lights move back but I don't trust it unless I hear from some experienced growers that it indeed does work and the plants will be ok. Are the two 600w lamps going to be enough with a light mover to deliver the necessary lighting for a Sea of Green setup in an 8' x 8' area or would I need two 1000w lamps? I will be delivering only light to the tops of the plants and trimming the bottom 1/3.