I do have a UTH set at 92 but it does nothing for the ambient temps. My house is about 65 degrees right now, so I HAVE to use the lamps. I'm starting to think about the tubs more, but I just dont want to do it.
Any particular reason why you don't want to make the switch? Obviously a tank is going to be a lot more visual appealing, but happy ball pythons don't really move that much anyway, so not a whole lot of fun to watch XD haha