Video encyclopedia

20/12/1879 Light Bulb


Thomas Edison's Light Bulb


Making a Vintage Edison Bulb Lamp


Let There Be Light - The Invention Of The Light Bulb I THE INDUSTRIAL REVOLUTION


Ask History: Who Really Invented the Light Bulb? | History

An electric light is a device that produces visible light from an electric current. It is the most common form of artificial lighting and is essential to modern society, providing interior lighting for buildings and exterior light for evening and nighttime activities. In technical usage, a replaceable component that produces light from electricity is called a lamp. Lamps are commonly called light bulbs; for example, the incandescent light bulb. Lamps usually have a base made of ceramic, metal, glass or plastic, which secures the lamp in the socket of a light fixture. The electrical connection to the socket may be made with a screw-thread base, two metal pins, two metal caps or a bayonet cap.
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    • Essentials 

    • Other English inventions 

    • History 

    • Efficacy, efficiency 

    • Construction 

    • Manufacturing 

    • Filament 

    • Electrical characteristics 

    • Physical characteristics 

    • Light output and lifetime