Yeah, that's pretty much my situation. I have a UTH, but it doesn't feel warm enough. It doesn't have a temperature dial (which is a no-no, I know) and the substrate I'm using is aspen bedding. The aspen isn't conducting and conserving a sufficient amount of heat. So would a ceramic heating bulb be the way to go? I live in Canada near the western coast, and when it's not sunny, my house is almost always cold.