@kitedemon, so the diagram you provided above, are you suggesting just attaching the probe to the surface of the RHP itself and then setting the temp at whatever setting acheives the desired temps below? (e.g., setting the thermostat to 115 with probe attached to the surface of the RHP and measuring the surface temps below at 91).

If so, how do you attach the probe? Tape or hot glue?

In addition, it seems like LED lights might be a decent way to bump ambient temps, but are there reptile friendly ones available. Thanks again.