A 150hps light with all the necessary equipment is $70 at htg supply right now. I need 50watts per sq feet, so this would be 50 watts less than ideal. But figuring in that i have a grow tent with reflective walls, and a reflector on the bulb itself this might do well. I currently have a 400watt hps and it makes the grow tent get up to 95*, even with 170cfm exhaust fan and wide passive air intakes in a 69* outside of tent temperature. I will be doing a 12/12 from seed grow. And the very nature of that kind of grow would not need light penetration as much as a veg/flower type grow, because there will be no foliage. Will a 150hps be significantly cooler than a 400hps? This is my main concern.