Nitrous, methanol, propane...not really.
Right now I have 1 of them hooked up to some reverse lights for hooking up trailers at night etc etc. I am getting ready to hook up another for additional front lights that I am recessing in to my front end replacement. I don't have anything hooked up to 3 of the 4 right now. I put them in so that they will be motivation to get more stuff for my truck. Lighting is a biggie because I'm always at job sites early in the morning and late at night and I need additional lighting. Not too sure what I'm going to hook the other up to yet. Any suggestions?...I'm not getting a winch on this truck, by the way.