I picked up a Zoomed rheostat from Petsmart for $20. Works great w/ lamps OR heat mats. I'm using it w/ a small UTH on my 10 gal. Under Tank Heaters will get VERY hot if not used in conjunction w/ a thermostat or rheostat. The control knob on mine is set at nearly the lowest setting and the glass on the tank gets up to 85-90 degrees. They recommend using terrarium carpeting if you use loose substrate that your snake can bury themselves in. Although, if the temperature is closely monitored, no problems should arise, and you should have yourself a happy lil' snake w/ a warm belly! =)