I want to line my car with Christmas lights, and i want to know if there is an adapter I should buy, or if I should hard wire them. Also, is there a known way to manipulate the lights so that I can add a switch to flick them on and off, and also, a way to make the lights pulse to the beat of my sound system? If the solution is "Go to Autozone and buy an $80 product" then need not respond. I'm doing this for fun, with the intentions of spending $40 maximum. Thanks.