A halogen lamp, also known as a tungsten halogen lamp or quartz iodine lamp, is an incandescent lamp that has a small amount of a halogen such as iodine or bromine added. The combination of the halogen gas and the tungsten filament produces a halogen cycle chemical reaction which redeposits evaporated tungsten back on the filament, increasing its life and maintaining the clarity of the envelope. Because of this, a halogen lamp can be operated at a higher temperature than a standard gas-filled lamp of similar power and operating life, producing light of a higher luminous efficacy and color temperature. The small size of halogen lamps permits their use in compact optical systems for projectors and illumination.
Read more about Halogen Lamp: History, Halogen Cycle, Effect of Voltage On Performance, Spectrum, Safety, Applications, Disposal
Famous quotes containing the word lamp:
“How can they know
Truth flourishes where the student’s lamp has shone,
And there alone, that have no solitude?
So the crowd come they care not what may come.
They have loud music, hope every day renewed
And heartier loves; that lamp is from the tomb.”
—William Butler Yeats (1865–1939)