Alot of newer cars now have complex headlight housings that do a really good job at focusing the light. Anyone thought, or tried to use this as a reflector for their pj?

I thought about it, but the light is spread over an uneven rectangle with a hot spot in the center.

I too have been toying with that idea. Currently I'm working on a parabolic reflector and it occures to me that a headlight does much the same thing. Yes, the light is uneven but how much of it do you need? Maybe the hotspot in the center is large enough to cover a small LCD. I like the nice white lights that are available, they stand out clearly from the traditional dingy yellow. The thing that makes me think the light from a headlight is not well collimated is the pattern imprinted on the surface. The idea of a parabolic reflector is to get all the rays going in a flat plane, I've decided a headlight would be largely uncollimated.

I saw one PJ with one, I think it was YWH but could have been some one else. He had a 10.6 panel.

The lamps are only 40 to 60 watts but can be over driven some. The arc is vary small so the performance is good. They really look like small PJ lamps.

I believe I spoke too quickly, I was considering "headlights" to be big boxy things. There are very small bulb style headlights these days, and some of them are brilliantly white. At the very least it deserves some followup to figure out what those whiter bulbs are. And the small size certainly screams for use in a projector. Let's think about this a bit more.

I used a HID Xenon car headlight in my projector. Check out my plog on lumenlab.