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2. List of automotive light bulb types - Wikipedia

   en.wikipedia.org/wiki/List_of_automotive_light...

   Replaceable Light Sources for Vehicle Headlamps; Bulb Type Trade Number Cap (Base) Filaments Nominal power @ 12.8v (High/Low beam where applicable) Comments Image HB1 9004 P29t 2 65 / 45 W HB2 9003 P43t-38 2 60 / 55 W H4 with stricter geometric tolerances HB3 9005 P20d (90°) 1 65 W HB3A 9005XS P20d (straight) 1 65 W HB3 w/180° straight base ...

3. Automotive lighting - Wikipedia

   en.wikipedia.org/wiki/Automotive_lighting

   Auxiliary high beam lights may be fitted to provide high-intensity light to enable the driver to see at longer range than the vehicle's high beam headlights. [13] Such lights are most notably fitted on rally cars, and are occasionally fitted to production vehicles derived from or imitating such cars.

4. Daytime running lamp - Wikipedia

   en.wikipedia.org/wiki/Daytime_running_lamp

   Full-voltage vs. parking light headlamp on European-market Volkswagen, 2007. Depending on prevailing regulations and equipment, vehicles may implement the daytime-running light function by functionally turning on specific lamps, by operating low-beam headlamps or fog lamps at full or reduced intensity, by operating high-beam headlamps at reduced intensity, or by steady-burning operation of the ...

5. Headlamp - Wikipedia

   en.wikipedia.org/wiki/Headlamp

   High-intensity discharge lamps (HID) produce light with an electric arc rather than a glowing filament. The high intensity of the arc comes from metallic salts that are vaporized within the arc chamber. These lamps have a higher efficacy than tungsten lamps.

6. Parabolic aluminized reflector - Wikipedia

   en.wikipedia.org/wiki/Parabolic_aluminized_reflector

   Between 1940 and 1956, all U.S. cars had to have two 7-inch (178 mm) round headlamps with dual filaments, so each lamp provided both a high and a low beam light distribution. In 1957, a system of four sealed-beam headlamps—two per side, of 5 + 3 / 4 inches (146 mm) diameter, was allowed in some U.S. states.

7. High-intensity discharge lamp - Wikipedia

   en.wikipedia.org/wiki/High-intensity_discharge_lamp

   High-intensity discharge lamps are a type of arc lamp. Brand new high-intensity discharge lamps make more visible light per unit of electric power consumed than fluorescent and incandescent lamps, since a greater proportion of their radiation is visible light in contrast to infrared. However, the lumen output of HID lighting can deteriorate by ...