Wow... Thank you all for responding. Question...

I have a nice aquarium setup for my snakes (I probably should post pics), but control the temp of the tanks with heating lamps. I am confused as to what seems to be a complete different setup from aquarium to rack system - namely, no heat lamp. Can heat tape really control the temp of the racks, making lamp heat unnecessary?

Note: I have my snakes in my office, which acclimates around 65 deg most of the time. This doesn't seem to be an issue for my snakes, thanks to the lamps.

Appreciate your insights...

FM