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Size of this PNG preview of this SVG file: 103 × 147 pixels. Other resolutions: 168 × 240 pixels | 336 × 480 pixels | 538 × 768 pixels | 717 × 1,024 pixels | 1,435 × 2,048 pixels . Original file (SVG file, nominally 103 × 147 pixels, file size: 4 KB)
Size of this PNG preview of this SVG file: 450 × 500 pixels. Other resolutions: 216 × 240 pixels ... Drawing of a 5 mm round (the "normal" type) LED. ...
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 .
Circular and U-shaped lamps were devised to reduce the length of fluorescent light fixtures. The first fluorescent light bulb and fixture were displayed to the general public at the 1939 New York World's Fair. The spiral CFL was invented in 1976 by Edward E. Hammer, an engineer with General Electric, [7] in response to the 1973 oil crisis. [8]
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Many compact fluorescent lamps integrate the auxiliary electronics into the base of the lamp, allowing them to fit into a regular light bulb socket. In US residences, fluorescent lamps are mostly found in kitchens, basements, or garages. Schools and businesses find the cost savings of fluorescent lamps to be significant and rarely use ...