[Kompressor]

Xenon is simply the gas used inside the lamp, creating the High Intensity Discharge.

Someone told me they're simiilar to stadium lighting HIDs, which use Mercury and sodium vapors. But if you've ever seen those lights start up, they take a good 3 or 4 minutes to light up to 100%. To solve that start up problem in car lamps, Xenon was used.

 

[Kompressor]

Originally posted by is300soon:
If lexus charges alot of money for those, why are they on Ebay for like 16$

They're fake. Xenon light requires special hardware, such as a ballast and coil because it requires a couple kV to start.