Xenon Lights Audi
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Xenon headlights are gas discharge lamps. Two tungsten electrodes are sealed in the burner, a thick-walled quartz glass cylinder filled with xenon gas. A concentrated electric arc burns between the electrodes, and the inert gas filling exerts a pressure of as much as 100 bar (1,450.38 psi). The xenon gas itself gives off a somewhat violet light. Metallic salts in the filling of the gas cylinder reduce its color temperature to 4,200 Kelvin.