Can I use Automotive Headlamps? Generally no. Most automotive headlamps are Halogen (see above as to why they are not ideal). The reflectors are designed to illuminate a roadway, not an LCD evenly. The only ones semi-suitable are Xenon, but you'd be ditching the lens and reflector to use just the bulb in your projector. They are extremely expensive also. Xenon lamps are also Metal Halide Discharge Lamps and thus have all of the same safety issues as our regular Metal Halide Lamps.