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2. Headlamp - Wikipedia

   en.wikipedia.org/wiki/Headlamp

   The high beam filament is on the focal point, while the low beam filament is approximately 1 cm forward of the focal point and 3 mm above the axis. Below the low beam filament is a cup-shaped shield (called a "Graves shield") spanning an arc of 165°. When the low beam filament is illuminated, this shield casts a shadow on the corresponding ...

3. 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 ...

4. Automotive lighting - Wikipedia

   en.wikipedia.org/wiki/Automotive_lighting

   UN ECE regulations for dipped beam headlights specify a beam with a sharp, asymmetric cut-off; the half of the beam closest to oncoming drivers is flat and low, while the half of the beam closest to the outside of the road slopes up and towards the near side of the roadway. This permits a functional compromise where it is possible to ...

5. Headlights are blinding us. Here’s why it’s mostly an ...

   www.aol.com/finance/headlights-blinding-us-why...

   But, while driving, the lights work just like standard high beam, low beam headlights. Their adaptive capabilities aren’t enabled here because they still don’t meet US rules.

6. List of automotive light bulb types - Wikipedia

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

   UN Regulation 37 covers motor vehicle filament lamps. These are categorized in three groups: those without general restriction that can be used in any application, those acceptable only for signalling lights (not for road illumination lamps), and those no longer allowable as light sources for new type approvals but still permitted for production as replacement parts.

7. Federal Motor Vehicle Safety Standard 108 - Wikipedia

   en.wikipedia.org/wiki/Federal_Motor_Vehicle...

   In order to show compliance to FMVSS 108, the lens of each original equipment and replacement headlamp, daytime running lamp (DRL) and certain conspicuity reflectors must be marked with the symbol “DOT.” This symbol may also be applied to compliant signal lighting devices, but is not mandatory.