<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by H2Finally:
Normal HID has 1 bulb. A shield covers top half in low beam, and flipped up for high beam.
Bi-xenons have 2 bulbs, one for low beam, one for high beam -- and usually cost a whole lot more.
That's all I know.. </div></BLOCKQUOTE>
Bi-xenon setups also have a single bulb that either has a reflector that moves as you mentioned, or in many cases the bulb actually moves in & out of the base to change between High & Low beam. I have the Delta Bi-xenon setup & it works very well.
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