GE Lighting Trained

Incandescent/Halogen Lamps 7 of 15	.
Halogen Lamps	Halogen lamps are more efficient than incandescent lamps and can be designed to last longer.
In halogen lamps the filament is enclosed in a filament tube. The filament tube is made of quartz or special high temperature glass and is filled with halogen gas..	Standard incandescent lamps burn out because heat slowly vaporizes the filament. Particles of metal are deposited inside the glass bulb, blackening and thus dimming the lamp. The filament becomes thinner until it breaks. In halogen lamps the halogen gas (bromine or iodine) recycles the tungsten back onto the filament surface and keeps it from depositing on the bulb wall. This allows the filament to burn more intensely without sacrificing life; also, lumen maintenance is improved because bulb blackening is eliminated. The diagram shown is a standard halogen lamp. The components labeled are the basic components common to all halogen lamps.
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