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English: Diagram showing the major parts of a modern incandescent light bulb. Glass bulb; Inert gas; Tungsten filament; Contact wire (goes to the foot) Contact wire (goes to the base)
Incandescent light bulbs consist of an air-tight glass enclosure (the envelope, or bulb) with a filament of tungsten wire inside the bulb, through which an electric current is passed. Contact wires and a base with two (or more) conductors provide electrical connections to the filament.
Diagram showing the major parts of a modern incandescent light bulb. This version has none of the parts labeled. For a version with labels, see Image:Incandescent light bulb.svg
Bill takes apart an incandescent light bulb to how the filament is made. He shows extreme close-ups of the filament, and he discusses the materials processing need to make the ductile tungsten used. Transcript Transcript Now, most of us believe that after Thomas Edison - or Joseph Swan if you're British - invented the light bulb in the 1870s it ...
Flameless candles display flickering light, imitating that of actual flames. As a decorative element, the design of a flameless candle is relatively versatile. The body or "housing" of the device is commonly cylindrical, containing a battery pack and an often flame-shaped LED lamp atop the candle.
Lite-Brite is a toy that was originally marketed in 1967. It consists of a light box with small colored plastic pegs that fit into a panel and illuminate to create a lit picture, by either using one of the included templates or creating a "freeform" image on a blank sheet of black paper.