RHP Sizing for T8

[WhompingWillow]

Which actually leads to another question, where do you mount the probe with an RHP?

Different people do different things. Personally I have a small hole drilled on the same side as the heat panel towards the bottom of the cage, maybe 3-4 inches off the floor. The probe goes through that, sticking out about 2 inches) and I set my thermostat accordingly. Some people dangle their cord down the wall so it's close to the floor.

With the probe towards the bottom of the cage your thermostat will likely need to be set for LOWER than the desired hot spot. (ie, in my living room with ambient temps of 70 degrees, my Herpstat is set to approximately 81.5 degrees to reach a hot spot of 88-90).

Other put the probe very close to the heat panel (this is actually what Reptile Basics recommends). With this method you will likely need to set the thermostat HIGHER than your desired floor temp, or very close to it, as the probe will heat up faster than the floor of the cage.

Edited to say that all of this is if you are putting the probe on the hot side, not the cool side.