Where as in Bi-xenon bulbs, the bulb itself has mechanism to move the bulb to give the same effect of dual filament bulb like H4. A bi-xenon will work in conventional reflector (conventional headlight that uses H4 bulb), but will have no effect on a projector.
In simple term..
In Bi-xenon, the bulbs does the hi-lo function and works in conventional reflector.
In projector, the projectors does the hi-lo function, the bulb has only single beam.
Note: A hi-lo projectors are rare. Most cars/bikes use single beam projector and instead uses two lamps. One for low and the other for high.






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