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Selective yellow or non-spectral yellow is a colour for automotive lamps, particularly headlamps and other road-illumination lamps such as fog lamps. [1] Under ECE regulations , headlamps were formerly permitted to be either white or selective yellow—in France , selective yellow was mandatory for all vehicles' road-illumination lamps until 1993.
The French yellow-light mandate was based on observations by the French Academy of Sciences in 1934, when the academy recorded that the selective yellow light was less dazzling than white light and that the light diffused less in fog than green or blue lights. [citation needed] Yellow light was obtained by dint of yellow glass for the headlight ...
1 Yellow headlights still allowed in Europe / the EU? They are in The Netherlands.
Others still can be seen with yellow lights, like in Spain. As in most of the world, utility vehicles usually use flashing yellow/amber lights. Although only emergency and utility vehicles are allowed to display flashing colored lights, this law is usually not enforced and it is common to see private vehicles customized with colored lights.
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If someone flashes their headlights at you, it can sometimes mean law enforcement is nearby. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways ...
Background: In 2013, a new Florida law took effect allowing the practice of flashing headlights at another driver, for any reason, although it all started with a case involving warning others on ...
Selective yellow fog lights. In most countries, weather conditions rarely necessitate the use of front fog lights and there is no legal requirement for them, so their primary purpose is frequently cosmetic. They are often available as optional extras or only on higher trim levels of many cars.