Despite what most of the rest of the community will probably tell you, most of my cool temps range from about 75-82 depending on how chilly it is outside. However, I will say my bp has been off feed for over 2 months now. However, we also have corns and boas at low side temps almost identical, and they all eat just fine.

Depending on the type of enclosure, you may be able to add another UTH to the cold side and control it with a dimmer.

And FYI, no, the Acurites are not waterproof. Sometimes they can withstand a very gentle misting, but overall, you should try to avoid it.