Best places to shop for temp control are ReptileBasics.com for the 'high end' thermostats, and ReptileSupply.com for the cheaper, but still acceptable, ZooMed stats or rheostats. Better to spend the $30 on a ZooMed stat while you save up for the better Johnson or Ranco..or better yet, Herpstat...then spend on a dimmer or rheostat unless your room temps stay within a degree or two all the time. Unfortunately, not many pet stores will carry the thermostats or rheostats, even tho reptiles owners really need them.