Since your house is so cold I’d get two uths, one for cool side and one for hot. As already mentioned make sure to use thermostats. If you place them under a solid hide like an eco terra/zilla cave it will hold heat better. Make sure to carefully monitor temps until everything is set up correctly. For daylight it’s good to have a basking bulb as well. I find that my bp loves to bask. I have a large ceramic log to create a vertical heat gradient as he loves to climb. It’s only like 12” tall so if he falls he’s fine.
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