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Two Mercedes-Benz SLs: right with US-spec sealed-beam headlamps; left with European-spec composite replaceable-bulb headlamps In the United States of America, sealed-beam headlamps were introduced in 1939, becoming standard equipment across all American-market vehicles starting in 1940 and remaining the only type allowed for almost four and a ...
U.S. standard 7-inch headlamp combining low and high beam with turn signal lights below on a 1949 Nash 600 Glass-covered 5¾" sealed beam headlamps on a 1965 Chrysler 300 Rectangular sealed-beam headlamps with turn signal light below on a 1979 AMC Concord. Headlight design in the U.S. changed very little from 1940 to 1983. [7] [16]
Bulbs used for headlamps, turn signals and brake lamps may be required to comply with international and national regulations governing the types of lamps used. Other automotive lighting applications such as auxiliary lamps or interior lighting may not be regulated, but common types are used by many automotive manufacturers.
This beam is specified for use whenever other vehicles are present ahead. 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 ...
For 2018, the Express dropped sealed-beam headlights from all models, adopting the four composite headlamps of higher-trim passenger vans. [18] A blind spot monitoring system also became optional. For the 2019 model year, higher-trim passenger vans received lane departure warning systems and collision alert warning features.
The Cheyenne made its return as the standard trim (replacing the Custom Deluxe), with the Scottsdale and Silverado serving as the top two trims. Externally, the Cheyenne was distinguished by its two sealed-beam headlights; the Scottsdale and Silverado were fitted with four headlamps (replaced by rectangular composite headlamps for 1990).