The incandescent light bulb or incandescent lamp is a source of artificial light that works by incandescence. An electrical current passes through a thin filament, heating it and causing it to become excited, releasing light in the process. The enclosing glass bulb prevents oxygen of the air from reaching the hot filament, which would otherwise be rapidly oxidized and destroyed.
Incandescent bulbs constitute a class of electric lamps, extending the use of a term applied to the original arc lamps. In Australia and South Africa, they are also called light globes or light bulbs.
Contents [hide]
1 Operation
2 History of the light bulb
3 The halogen lamp
3.1 Halogen infrared
3.2 Safety
3.3 Handling precautions
4 Applications and popularity
5 Efficiency and alternatives
6 Legislation
6.1 Canada
6.2 Europe
7 Standard fittings
8 Power
9 Comparison of electricity cost
10 Voltage, light output, and lifetime
11 Luminous efficacy and efficiency
12 Notes
13 References
14 External links
15 Credits
An advantage of the incandescent bulbs is that they can be produced for a wide range of voltages, from a few volts to several hundred volts. On the other hand, given their relatively poor luminous efficacy, incandescent light bulbs are gradually being replaced in many applications by (compact) fluorescent lights, high-intensity discharge lamps, LEDs, and other devices.
The incandescent light bulb or incandescent lamp is a source of artificial light that works by incandescence. An electrical current passes through a thin filament, heating it and causing it to become excited, releasing light in the process. The enclosing glass bulb prevents oxygen of the air from reaching the hot filament, which would otherwise be rapidly oxidized and destroyed.Incandescent bulbs constitute a class of electric lamps, extending the use of a term applied to the original arc lamps. In Australia and South Africa, they are also called light globes or light bulbs.Contents [hide]1 Operation2 History of the light bulb3 The halogen lamp3.1 Halogen infrared3.2 Safety3.3 Handling precautions4 Applications and popularity5 Efficiency and alternatives6 Legislation6.1 Canada6.2 Europe7 Standard fittings8 Power9 Comparison of electricity cost10 Voltage, light output, and lifetime11 Luminous efficacy and efficiency12 Notes13 References14 External links15 Credits An advantage of the incandescent bulbs is that they can be produced for a wide range of voltages, from a few volts to several hundred volts. On the other hand, given their relatively poor luminous efficacy, incandescent light bulbs are gradually being replaced in many applications by (compact) fluorescent lights, high-intensity discharge lamps, LEDs, and other devices.
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