Just use a CHE. That's what I use and for lighting I just use room/daylight. Works good and Dot gives her seal of approval as she eats like the world is coming to an end every 3 days. I keep my light in the middle of my 36x18. Don't really need the heat on the UTH side as well the UTH is providing the belly heat. Also CHEs will last a lot longer than heat bulbs and aren't prone to dying if you move them or they get bumped.