eventually you are going to get into the ultraviolet range, I wonder what that would look like, maybe UV Fog
$250 is not a bad price, then usually range from $200-$500 for a kit, however I reccommend that you use a projector retrofit with a 4300k kit if you can afford it, it puts out the most light and has a HID cutoff to prevent others from being blinded.
Be careful with 12k PnPs, if anyone is blinded and runs off the road it will be considered your fault for having illegal lights
