In a car, the life of incandescent lamps is significantly shorter than that of household lamps. Not only constant shaking is to blame for this, but also high temperatures in small glass flasks. This intense heating vaporizes the helical filament material. In traditional lamps, a metallic mist is deposited on the inner walls of incandescent lamps. In halogen lamps, the situation is different: due to a special gas filler in these lamps, the evaporated metal particles again return to the spiral filament and settle on it in the form of crystals. Therefore, aged halogen lamps are recognized by the effect of a certain flicker of the filament. Due to this, the spiral becomes fragile and breaks off especially easily, but it burns at full strength until the last hour of its glow.
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