You definitely do not want any UTH components when working with tortoises. I would go for a CHE to run during the night. In my closed chamber tort enclosure I have a 100w CHE on 24/7 and a 45w bulb for basking. All my temperatures stay great. Redfoots require high humidity as hatchlings and juvies, so you might want to configure a way to close off at least part of the enclosure to get the humidity up. Although being in Miami this might be less of an issue and Colorado.