I am trying to prepare for housing lots of Sulcatas and all the problems that come with it. We currently use Kane Mats or Stanfield under and over our Sulcatas to keep them warm. Well when you have over a dozen of these houses to heat that way can become a lot to do and deal with. I am thinking of using 200 watt or 250 watt heat panels to heat the entire house. I am most likely going with @Tom night box plans, 1 for each tort, as our setup doesn't fit well with double night boxes. If these will work it will eliminate all the hassles that come with the cord and the digging, wiggling back and forth and make the electrical wiring so much easier. Wondering if anyone does it this way instead of a radiant heater that takes a minimum of 600 watts. Of course the panel will be hooked to a thermostat.