Quote:
Originally Posted by justinnum1
Xenon is the actual light source for the headlights, its the projector like bulb that the whiteish/blue light comes from
LED's are a different type of light, they are used more for aesthetic purposes(audi led strips, MB led strips...) Also they are used as turn signal lights and break lights.
Hope that helps
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To further muddy the waters, BMW and Audi also use LED's for full lighting, at least optionally, on the X6, A6, A7, A8 and R8. I have used various lights for bicycling at night and find that I prefer LED's to HID and halogen, and actually dislike HID's for their fussy balance and power consumption. I'd guess that as manufacturers try to cut all excessive power consumption, HID's will quickly give way to LED's.