My friends zoo med U.T.H. pad got so hot it cracked the glass tank. The snake is worth $1000, thankfully she wasn't injured. Upon seeing photos they are sending him replacement product. I know they get hot if there isn't proper air circulation. I agree that you should use a thermostat product with them so they can't over heat. I only use powersun bulbs myself. I've only had a problem once & it ended up being a problem with the ceramic dome. It was a fairly new dome but it was causing the bulbs to blow frequently. Good luck!