My dimmer switch for my ball python works pretty good. I have to fiddle with it a couple times a day, but it does work. But mine is a lamp dimmer. If it's all the way off, my heat pad is pretty much off. If it's all the way up, it's 120+. If I get it in the middle towards the top justtt right, its 93 But I am getting two ranco's soon...one off of ebay, and on off of this forum, because fiddling with the dimmer switch is annoying.

They work, but it's annoying.