Quote Originally Posted by applio View Post
not 100% ture, if you had a projector housing, you still got the clear cut off line, you just dont got the autoleveling system, but you can manuel adjusting it, and also not the wash system!

some OEM HID are come in reflector houisng too, the r34 GTR come stock HID on reflector housing, and not all HID installed on reflector housing will spills half of them on the air, most of the reflector houisng come with the little reflecting cap will able to control the reflection of the light. but they still dont have a clear cut off line, and some of the beam pattern are still uncontroable. but unlike if you put HID in some BMW that runing H7 on a reflector housing, since they dont have the little reflecting cap comes with, they do spill half of them on the air, when facing against a wall the beam pattern looks like a big circles....
I'm not talking about something as simple as projectors and reflectors. In a projector housing, the lens focal length and distance from the bulb is calculated for a halogen bulb. When you put a HID kit in, the focal length and distance is no longer suitable for the light source. Go pull out the headlights from the base and the lux Euro, they have differences in terms of the distance between the lens and the back of the housing.