RHP size for PVC enclosures in cooler temp homes.

[CALM Pythons]

I ordered a 50 watt panel (custom size) because it needs to be skinny enough to fit w/ the existing LED light panel which was installed in the pvc enclosure.

My basement thermostat is set to 82 which controls a wall unit which heats the room. My hopes were that I would be able to discontinue the use of this unit w/ the intro of the RHP (or at least set it to a much lower temp then 82).

Sounds like you think a 50 watt RHP might not do the trick??

You will be able to set it to a lower temp yes. It will work fine during summer without AC on down there.. But during winter in a basement with that size RHP you will have to keep the basement id guess at 70.