Well depending on you live if the ambient temps in the room are warm enough from it being hot outside you can turn all the heat off and just use that ambient heat to keep everyone warm. Many large breeders don't use uth or lamps or rhps they will just heat the entire reptile room/facility to a certain temp and that's allin the summer time in Nashville when it's like 100+ degrees I turn off all heat to my racks and let the ambient a keep them warm.
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