Exactly, I've learned this lesson. I have to keep my bedroom a little on the warm side to get proper ambient temps. Had I been more knowledgeable before purchasing racks I probably would have went for back heat for both since they seem to be better at maintaining ambient temps. Although I did score mine from craigslist for a killer deal. So I'm not too upset about it.
Belly heat would be a better option if I had a dedicated snake room.
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