not necessarily true. Two completely different heat sources. Heat mats , YES mount the prob directly to the mat on the outside of the cage. RHP, NO. Mount the t Stat prob to the wall about 4" from the floor directly under the rhp. Set your desired temp and check with heat gun. Adjust set temp + / - to achieve correct temp. Rhp are mounted to the ceiling. Your snake CAN NOT lay on them long enough to get burned. ( providing your enclosure is an inside height of 2 feet tall.) If you mount the probe to the panel and set your temp to let's say 130 deg. By the time you take a reading 2 feet down you will barely notice a change. Rhp are designed to run in the 170 - 190 deg range. Sounds very hot but I promise you can lay a flat hand on it for at least 15-20 seconds without a burn. If you have any questions talk to Bob at products. The man knows his stuff.
Notice how you interpreted my answer to mean what you wanted it to mean so you could refute my statement. In actuality, I said "as close as possible to be able to regulate heat properly".