Halogens are Incandescent Lamps where the filament envelope is filled with a gas from the Halogen Family ( Chlorine, Bromine, Fluorine, Iodine) thus enabling it to produce a larger amount of light and have a significantly longer life, since the halogen enables the tungsten vapour to recondense back on the filament. As a result, halogens are twice as efficient and have twice the lifetime of Incandescent Bulbs.
DISADVANTAGES OF HALOGENS IN GREEN BUILDINGS:
Because of the poor efficiency they cannot be considered energy efficient light sources. Hence there is the fear that they may become a casualty soon. I hope lighting companies continue their efforts to make these halogens more efficient, so that they can be used for their unique advantages.
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