 |
Just like Volvo vehicles, vehicle light system has evolved in the span of a century.
On early models of automobiles lights were mere lamps. And because automobiles
for outdoor transportation the lamps used acetylene or oil which can resist wind
and rain. In 1898, a more ‘high-tech headlights were introduced which used electricity
for power. Other evolutions of car headlights include the invention of ‘Dipping’
lights with low beam capacity that was soon followed by the combination of low
and high beam feature in a single bulb.
In 1940, the sealed beam was introduced that later became the standard headlight
for all the vehicles in the United States. Several countries such as Australia,
Britain, and Japan used the benefit of sealed beam lights to the vehicles they
manufacture. It also evolved having the availability of rectangular shaped sealed
beams not just the original circular sealed beams. Standardized sizes also come
in the later years as the popularity of the sealed beams soar.
A sealed beam headlight has a small bulb that emits enough light. With the help
of several reflectors, filament, and lens, a sealed beam headlight enables it
to illuminate brighter without consuming big amount of fuel.
Today, the sealed beam are still widely use for its fuel economy and durability.
On the outside, the sealed beam almost scratch free leaving no mark of imperfection.
It is can also tolerate higher temperature. But sometimes, due to the vacuum or
pressure inside, the sealed beam can break. In this case, the whole light should
be replaced.
Although there are several other types of headlight construction like the reflector
optics, LED headlights, HID headlamps, and projector optics, the popularity and
wide use of sealed beam headlights are still unmatched until today.
|
|
 |
