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Incandescent lamps are artificial sources of light emission in which light emitting incandescent body, which are heated by an electric current to excess heat. For the production of bodies of filament helix are used mainly of refractory metal, for example tungsten or carbon filament. In order to avoid oxidation bodies filament during their contact with air, they are placed in a vacuum flask, or flask filled with inert gases or steam halogen gases.
There are very diverse and is directly It depends on the purpose of application of the lamps. But you can still identify the common elements such as the body of the heating, the flask and the current lead. Today, there are a very large variety of species and types of lamps are used everywhere, and without them it is hard to imagine any industry.