Sealed-beams had to stand fully vertical to light the way, but Sixties sports cars were made of low, sleek lines. The Corvette’s answer was to simply hide its dual 5 3/4-inchers.

Sealed Beams. A sealed-beam headlamp is nothing different from a giant household bulb, a tungsten filament housed in a glass enclosure that's sealed and filled with inert gases.

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 ...

The law wasn't changed until 1957, and only then did the government allow the use of four round, sealed beam headlights instead of just two — with each of those having a smaller 5 3/4-inch diameter.

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.

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.

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 ...

Even in the case of converting sealed beam headlights to LEDs. While the ladder is certainly better on paper, I have personally learned the hard way that sealed beams work way better than a lot of ...