I have used several types of UTHs when keeping reptiles when I was younger. Currently, I use both ZooMed and Ultratherms from Reptil Basics. The Ultratherms are hands-down the best UTH I've ever used. And they aren't any more expensive than ZooMed or Exo-Terra. I highly recommend this brand over any other. While I get them from Reptile Basics, they may be available elsewhere - I just haven't bothered to look somewhere else since I'm happy purchasing from RBI. Hope this is helpful...![]()