Headlight technology has come a long way since the heyday of the sealed beam, and upgrades are plentiful, but which is best? By James Gilboy Updated Jul 29, 2019 3:33 PM EDT ...

Automakers started replacing sealed-beam lights with quartz-iodine technology in 1973. Quartz-Iodine. Stuart Tyson. Sylvania Silverstar H13 1. Quartz Glass 2. Support Strut 3. High Beam 4.

Starting in 1940, U.S. automakers agreed on the round seven-inch sealed-beam as the universal standard headlight. It made replacing a broken lamp easy, no matter the car’s make or model.

Federal regulations were expanded slightly in 1957 to allow automakers the option of using four smaller 5 3/4-inch sealed beam (PAR46) headlights. By 1958, most of the pricey American cars ...

Replacing and Adjusting Sealed-Beam Headlights. Older vehicles have sealed-beam units, which are relatively easy to deal with. If one of your headlights ceases to shine, ...

Sealed beam headlights work a lot better than you’d think if you only ever read marketing material. They offer plenty of down-road visibility, and you can comfortably navigate dark backroads ...

Sleek, stylish, and full of retro charm -- discover the lost art of hidden headlights in 20th century automotive design.

General Electric created the sealed-beam headlight in 1939, which used an electric bulb, a reflector, and a glass lens to point the light forward for clearer visibility.

It wasn't always this way. From the 1950s to the 1980s, vehicles used sealed-beam headlights, which didn't produce enough light to keep drivers safe on the road.

Anyone who has driven a car equipped with the old sealed-beam headlights from the 1980s will know that modern LED lighting technology is one of the greatest improvements of the modern automotive ...