Size of UTH?

[Vypyrz]

Okay, so if my ambient room temps are around 70F, should I go with 1/3 of the base or go a little bigger? Thanks for your response.

I size my UTH's so that they will cover at least 1/3 of the floor space, but not more than 1/2. Going with 1/2 will give you a little extra UTH length in case you need to set the water bowl over it to help with humidity.

Do you have a recommendation for rheostat vs thermostat?

Thermostat sounds nice, but worries me in case it bugs out.

I prefer thermostats because alot of times rheostats need to be adjusted whenever the room temp changes. And sometimes, especially around Spring/Summer, you may find that even on the lowest setting, a rheostat can still be too hot...