Halogen lights and bulbs are types of the incandescent light technology. These lights and bulbs function by letting electricity pass through a filament or thin wire of tungsten enclosed by a tube of glass filled with halogen gas. The halogen gas serves as the catalyst for chemical reaction. The reaction causes the tungsten to be removed from the glass wall and deposited back to the filament. This is the cause of the bulbs’ long life. Though an offshoot of the incandescent technology, the filaments in halogen lights and bulbs must have higher temperature than those used in incandescent lights for the reaction to happen. This results in a brighter and whiter light.
However, the brighter light of halogen lights and bulbs causes the tungsten to evaporate faster, hence, the need for an expensive gas to stagger the evaporation. The gas of choice used is krypton gas. Together with a high pressure, these two effectively stagger and lower the evaporation rate of tungsten in halogen lights. This process also requires a thicker and smaller bulb which translates into higher temperature. A temperature of 300 degrees Celsius is not uncommon for halogen bulbs. This is the reason...
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