I don't have anything in there to measure temp. Going to pick one up and get a hotter bulb, see if that will help.I use two 160 watt bulbs in my adult argentines, though I'll be changing two a few flood lights as they dry the hell out of the basking area. They're probably about a foot and a half to two feet away and get the 2.5 ft basking area to 110-122.