Originally Posted by PRS 2 TiFJ
The H4s come with a shield because they are bi-xenon. the big opening you see facing you in the picture is for the low beams. it faces up and reflects light off the top of the reflector and down and the shield blocks light from hitting the bottom the reflector and up. The little bubble in the middle of the bulb is the light source for the HID. When you hit the high beams a solenoid in the base pulls the bulb in and moves that bubble light source into that little window you see in the back. This allows light to hit the bottom of the reflector and light goes high for high beams. I have a setup just like this and they seem to produce a decent cut off. I never get flashed.
LOL... now look at the "big hole" for high beams on that bulb, and the precision of a factory halogen bulb. Is there any doubt that those kits, even with the shield, aren't completely sloppy?
I like the attitude though of the guy skirting inspection. Nice.