High-intensity discharge lamps are a type of electrical gas-discharge lamp which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused
15 kW xenon short-arc lamp used in IMAX projectors
Ballasts for discharge lamps
Headlamp
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A headlamp is a lamp attached to the front of a vehicle to illuminate the road ahead. Headlamps are also often called headlights, but in United States usage, headlamp is the term for the device itself
High-intensity discharge lamp
…contrast to infrared. However, the lumen output of HID lighting can deteriorate by up to 70% over 10,000 burning hours. HID bulbs are commonly used in vehicle headlamps. Various types of chemistry are used in the arc tubes of HID lamps, depending on the desired characteristics of light intensity, correlated color…
A motor scooter's front with an impractical number and variety of headlamps, added for decorative purposes and characteristic of Mod culture
Ford Model T with acetylene gas headlamps
One of the first optical headlamp lenses, the Corning Conaphore. Selective yellow "Noviol" glass version shown.
1929 Cord L-29 with Woodlite headlamps U.S. patent 1,679,108