Since you are already doing it and as you are inside the min recommended distances I would really check the temps you have. Turn off any fan replace the doors for 30 min to one hour and check the panel face and the temp on the floor directly under the RHP as well as the ambient air temp 4 inches down from the ceiling and on the far side away from the RHP. as well as floor surface there. I might also after these are done add a hide under the RHP and wait an hour and check the hide top floor under it and ceiling of the hide. I would do all this with the lights off and then again with them on for a few hours. It is amazing how much difference FL lights can make.
This will give you a sense of how much effect the panel is having on the cool side (what is the difference between floor under it and away from it) How hot the floor (under the RHP) will become (if you really need to rethink that min distance you are at least 7-11 inches inside of) Also the temp difference you can expect between the top of the hide outside and the temp inside it.
The more information you can gather about what the maxed out temp is the easier it will be to see what it is doing and how it effects the rest of the system. When the temps are lower everything will be more subtle so it is harder to figure out. It will also give you a sense of what the penalty of a full T-stat failure is. Personally I have no set up that if you just plug the heaters into the wall (full Tstat failure I also run a failsafe system or a backup system so it is very very unlikely) the snakes inside would be subjected to NO more than 100ºF higher than comfortable but lower than really dangerous.
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