One more thing, as they got bigger I moved them from under a vitilum plus grow, ho t5, 4x24 sunleaves Pioneer VIII. To a 400w MH in a mylar cacoon. It's an open reflector with no ventilation except the holes in the top of the mylar and convection. It's in a crawl with only 4.5 ft of space. It's snowing outside and it's 55 mayb 60 in the crawl, but with the bulb on 24/7 it keeps it @ 80 to 83. Any suggestions on lighting problems?