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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.
Under ECE regulations, H1 lamps are required to emit white or selective yellow light. [1] U.S. regulations require H1 lamps to emit white light. [2] Under both ECE and U.S. specifications, the allowable range of white light is quite large; some H1 lamps have a slight blue or yellow tint to the glass yet still produce light legally acceptable under the requirement for white light.
As automotive lighting improves, LEDs are emerging at the lead. Offering remarkable vision and longevity, they are a go-to for many safety-minded drivers.
Audi showed the Audi Nuvolari concept car with LED headlights in 2003. [119] [120] [121] Automotive headlamp applications using light-emitting diodes (LEDs) have been undergoing development since 2004. [122] [123] In 2004, Audi released the first car with LED daytime running lights and directionals, the 2004 Audi A8 W12. [124] [125]
HMS Basilisk (H11), a Royal Navy B-class destroyer; HMS Racehorse (H11), a Royal Navy R-class destroyer; HMS H11, a Royal Navy H-class submarine; London Buses route H11, a Transport for London contracted bus route; Sanguiin H 11, a type of tannin; A motor vehicle headlamp bulb type; see List of automotive light bulb types
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