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An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a filament that is heated until it glows. The filament is enclosed in a glass bulb that is either evacuated or filled with inert gas to protect the filament from oxidation. Electric current is supplied to the filament by terminals or wires ...
An electric light, lamp, or light bulb is an electrical component that produces light.It is the most common form of artificial lighting.Lamps usually have a base made of ceramic, metal, glass, or plastic which secures the lamp in the socket of a light fixture, which is often called a "lamp" as well.
60 W incandescent light bulb with energy efficiency class E Equivalent 42 W halogen incandescent light bulb with efficiency class C Compact fluorescent lamp LED lamp. Various governments have passed legislation to phase out manufacturing or importation of incandescent light bulbs for general lighting in favor of more energy-efficient alternatives.
The original incandescent bulb throws light when the metal filament, made of tungsten, is heated. ... While the upcoming ban on Edison's incandescent bulbs may be a difficult adjustment for many ...
By comparison, that consumer would spend about $1 to operate an Energy Star-certified LED bulb, about $3.50 on a halogen incandescent bulb and about $1.20 on an Energy Star CFL bulb - each ...
Incandescent bulbs create illumination by running an electric current through a filament that heats it until it glows. Edison's first practical light bulb used a carbonized cotton thread for that ...