Originally Posted by 4x4
Originally Posted by gingeRS
xenons are single filament (effectively) for cars with seperate main beam bulbs
bi-xenons, either have 2 bulbs, or are motorised, and are suitbale for cars which use the same bulb for both dipped and main beams (RST's cossies etc)
hope this helps

so bi xenons could have a dipped light which shines xenon and a main beam which is xenon???

yup...most kits are motorised so they create the correct dipped pattern, then move a shield to create the main beam pattern