Thread: 04 STi HID pics
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Old 05-20-2003, 01:54 PM   #9
Scooby Specialist
Member#: 5887
Join Date: Apr 2001
Chapter/Region: BAIC
Location: Fremont, CA USA
2002 GDAA (bugeye)
797 (blaze yellow)


Originally posted by Adiliyo
that's what confused me too...why would they go from better ( i think) projector systems to reflector ones? is one cheaper than the other?
Afaik, the two benefit I know with projector housings is that a good light pattern can be achieved in a smaller volume/space (compared to the current reflector design), and that a sharp beam cutoff can be achieved simply by placing a cover plate inside the housing.

It's possible that the new reflector design is such that one or both of these advantages are no longer significant. Space is definitely not an issue, unless the car design calls for tiny headlights (notice how oem projector lights are relatively small, but additional area is included around it to make the overal headlight seem not too small). The other issue, the ability to have a sharp beam cutoff, is either considered not worth the cost, or perhaps the new reflector design allows for a reasonably good beam cutoff, reducing the motivation to go with projector beams. Better yet, the new design might be made such that the reflector facets can work for both halogen filament and xenon arc bulbs. That would be a nontrivial feat, since halogen and xenon bulbs light up differently, but not necessarily impossible with the right numerical simulation / design.

my 2 cents
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