I wired up one with a dimmer like this: http://www.amazon.com/Leviton-6602-IW-Trimatron-Incandescent-Rotary/dp/B000FK9WYU/ref=sr_1_1?s=hi&ie=UTF8&qid=1401044999&sr=1-1

It's cheaper and has a ground. Works great tested it with one session.