Maybe I need a bigger air conditioner like 10,000 btu. I an exhausting, it 's just too hot. I even have a fan on. I guess I better go with the cfl's, I know my grow rate and yield will be greatly reduced. What if I decided to use my room as it is bigger than the tent and the air can circulate better? Will I have to Mylar all the walls like inside of my tent? I know I can do it with the cfl's but I paid $230 for the MH, HPS, and reflector.