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An incandescent mild bulb, also called an incandescent lamp or incandescent gentle globe, is an electric light that produces illumination by Joule heating a filament till it glows. The filament is enclosed in a glass bulb that is either evacuated or full of inert gasoline to guard the filament from oxidation. Electric present is supplied to the filament by terminals or wires embedded in the glass. A bulb socket supplies mechanical help and electrical connections. Incandescent bulbs are manufactured in a wide range of sizes, mild output, and voltage rankings, from 1.5 volts to about 300 volts. They require no external regulating tools, have low manufacturing prices, and work equally effectively on either alternating present or direct present. Because of this, the incandescent bulb became extensively used in household and commercial lighting, for portable lighting corresponding to desk lamps, automobile headlamps, EcoLight and flashlights, and for decorative and promoting lighting. Incandescent bulbs are much less efficient than other kinds of electric lighting.
Lower than 5% of the power they eat is transformed into visible gentle
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