E39/E40 Mogul Lamp Cap

This lamp cap is a component of an incandescent lamp. An incandescent lamp generates light by heating a tungsten filament until it glows inside a glass bulb filled with an inert gas to prevent oxidation. When electricity passes through the filament, it emits light through incandescence. Known for its warm light, incandescent lamps have been widely used since the 19th century but are less energy-efficient than LEDs and CFLs, leading to their decline in favor of more efficient lighting options.

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An incandescent lamp, also known as an incandescent light bulb, is a type of electric light that produces light through the heating of a filament wire to a high temperature until it glows. The filament is typically made of tungsten and is enclosed in a glass bulb filled with an inert gas, such as argon or nitrogen, to prevent the filament from oxidizing. When an electric current passes through the filament, it heats up and emits light in a process known as incandescence. Incandescent lamps are known for their warm light quality and have been widely used since the 19th century, but they are less energy-efficient compared to newer lighting technologies like LEDs and compact fluorescent lamps (CFLs).