My house stay at a 69 to 78 degrees during the day and at night it 72 to 64 so I donā??t think itā??s the location. The cfls get hot to the touch and are the only thing in there that heats up. I bought 4 from Wal-Mart and 4 from a grow shop on ebay if that matters. I'm going to do some tweaking on the fans and try again in a few days to see if I can lower the temps. With the lights off and the box just setting there the temps are 70.9 with nothing on at all.