I didn't read all of the above comments so i don't know where the conversation went. MY INPUT on this is that I also have a heat rock. It looks like yours plugs in and heats up electrically? I have got one that you put in the hotspot of your tank and it absorbs heat. Its designed to never get too hot. It also keeps heat for hours after turning off a lamp or whatever. I wouldn't use an electric one simply because many people have told me they over heat for pythons. If i were you I would place a thermometer next to it to keep an eye on how hot it gets OR even safer, put a thermostat on it. This is just my opinion. I try to give as much help as I receive on this website.