Definition

A halogen light bulb is a kind of incandescent bulb that incorporates halogen gas to increase its rated life as well as its light output. They are known for their high efficiency, rated life and the quality of light they produce. When compared to other incandescent bulbs, they last significantly longer due to their high rated life advantage.

The halogen bulb's history is almost identical to that of the incandescent light bulb. Chlorine was used to prevent blackening of the lamp in 1882. it wasn't until 195 that the company called General Electric created a viable halogen lamp that could be sold commercially.

Manner of Operation

Similar to incandescent lamps, halogen bulbs use a tungsten filament, which is heated and evaporated slowly to produce light a process called incandescence. However, the burning of the filament causes blackening of the glass enclosure, which in turn decreases the bulb's life as well as its light output.

However, halogen lamps effectively deal with this problem as the halogen gas in them chemically reacts to the tungsten, thus preventing it from blackening the glass. In addition, some of the tungsten is even returned by this reaction to the filament, which can help the bulb last longer than its classic sibling. Because halogen bulbs need high temperatures in order to make this reaction happen, halogen bulb enclosures must be crafted from quartz.

 

Applications

Halogens can be used in a wide array of applications, regardless if it's residential or commercial. These lamps can be used as headlamps for automobiles, cabinet lights, and even work lights. In addition, halogen-based reflectors like the PAR and MR lamps are preferred more by the public for places that need directed lights, as is often the case with spotlights. Halogen lamps are used more than incandescent reflectors because they are more efficient, however, the only time halogen lamps are not used is when heat from the light source becomes a critical issue.

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