Anyone Use Deep Heat Projectors

[Crowfingers]

While on the subject, are UVBs on a timer like one would for regular daytime lighting? Or are they on 24/7? I never actually used UVB for anything before so I never learned how it's utilized.

UVB's should be on a timer - they are full spectrum light, and fairly bright. leaving them on 24/7 would prevent any kind of day/night cycle and would essentially be like the sun being up all day.