You can. If your RHP is roughly half the size of your enclosure, you can set your T-stat to say 90deg, and everything under that RHP will be +/- a couple degree of 90. The temp on the other side will be something like 10deg cooler. That number will obviously fluctuate with ambient room temps though. To make a long story short, you can definitely maintain proper husbadry with either a RHP, or CHE paired with a T-stat. UTH isn't necessary, but it is nice to offer a hotspot to aid in digestion of heavier prey items.
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