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Uploaded on May 6, 2007
Starting and warmup of a Philips 35 watt D2R Automotive Xenon-Metal Halide HID lamp with the reflector removed.
This type of lamp is commonly used for headlights in luxury vehicles such as Mercedes, BMW, or Lexus.
Automotive Metal Halide lamps are commonly called "xenon lamps" due to the presence of xenon gas used to fill the arc tube. The xenon gas allows these lamps to provide a minimally adequate amount of light upon startup. If this lamp was filled with argon instead as is commonly done in street lamps or other stationary HID lamps; it would take several minutes for it to reach full brightness vs 30 seconds.