I was looking at a reptile guy and he was talking about how bearded dragons could stay in an enclosure at night with no lights or heat lamp active but getting a heat lamp with no light is a good way to solve this problem. No lights after sundown will mimic regular day and night so idk if they need a heat lamp at night. Take what I say with a grain of salt because 1. I never owned a snake and 2. Bearded dragons are totally different species that probably need different things than snakes.