If you look at the instructions for ANY heat source designed for reptiles it says do not run without regulation by a thermostat. We are not telling you this for our health or to get you to waste money. This advise is being given to you for the Health of your animal and for that purpose only. If you look at the animals that most if not all of the people on the site raise they are all ball pythons as well as others. Amoung the BPs are some very expensive morphs. The people telling you this as well as myself use these devises to protect our animals. Not for any other reason. You can get a zoomed rheostate from most pet stores and that will be better than nothing at all.