How does a OEM Bi-Xenon system work?
Very simple, Bi-Xenon means that both high and low beam is created by the same HID bulb. A Bi-Xenon system can be based on reflector and projector design. The latter one is the simplest. Hella has a Bi-Xenon system that has a moveable shield inside a projector unit. This is acomplished by using a spring loaded solenoid (just like in power door locks) or servo motor with 2 positions. Bi-Xenon came on many cars in 2002. The advantage compared to a traditional projector HID low beam/Halogen high beam is that you get HID low AND high beam. Bi-Xenon systems have additional flash-to-pass separate halogen lamps. Bi-Xenons System are a step up from regular low beam Xenons, since there will be better high beams. The high beams in a HID low beam HID/ halogen high beam combination has a tendancy to be degraded to a beam cutoff softener. It is easy to get spoiled by the powerful low beam HID which makes high beams with 65W halogen almost dim in comparison. They should have been 140W high beam. Bi-
