Hey guys. I'm starting a 90 sqft grow room. I am using 4 1000 watt hps/mh switchable lights, but atm only have HPS bulbs on me. The lights will be layed evenly across the room, spreading light evenly. My question is, would it be better to just use the 4 1000w HPS bulbs, or 2 hps and 2 MH bulbs? These to be exact Amazon.com: 1000w Watt MH Grow Light Bulb Metal Halide: Patio, Lawn & Garden. I would use either combination through out the whole grow. So what do you think? All insight is greeted Kal.