Xenon is like a incandescent car bulb just uses xenon gas in side and has a blue tinted glass... Right? Then there are HID kits for cars that are MH bulbs. I don't think the xenon bulbs take a ballast, correct? I'm not a car 'pro' but I'm pretty sure you are thinking of the HID kits... Am I right?
edit: the xenon lights I'm thinking of will not grow a plant up to standards, much like a incandescent. Now I have seen someone grow with car hid kit. It's a really small MH bulb. But you need like 3 of those kits, that's 6 bulbs. If you can get em cheap enough then give it a go and post pics along the way. But if you can't, you would be better off buying a 400w hps/mh off amazon for 140