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  2. Phoebus cartel - Wikipedia

    en.wikipedia.org/wiki/Phoebus_cartel

    The Phoebus cartel was an international cartel that controlled the manufacture and sale of incandescent light bulbs in much of Europe and North America between 1925 and 1939. . The cartel took over market territories and lowered the useful life of such bulbs, which is commonly cited as an example of planned obsolescen

  3. Gas-discharge lamp - Wikipedia

    en.wikipedia.org/wiki/Gas-discharge_lamp

    A flicker light bulb, flicker flame light bulb or flicker glow lamp is a gas-discharge lamp which produces light by ionizing a gas, usually neon mixed with helium and a small amount of nitrogen gas, by an electric current passing through two flame shaped electrode screens coated with partially decomposed barium azide. The ionized gas moves ...

  4. Gang colors - Wikipedia

    en.wikipedia.org/wiki/Gang_colors

    The most recognizable form of gang affiliation is based on color. Bandanas come in a wide range of colors and can be paired with other pieces of clothing to represent all colors of the gang. [8] Not only are bandanas an easy way to show gang affiliation they are also easy to remove if the situation calls for it (i.e. if confronted by law ...

  5. Neon lamp - Wikipedia

    en.wikipedia.org/wiki/Neon_lamp

    A General Electric NE-34 glow lamp, manufactured circa 1930. Neon was discovered in 1898 by William Ramsay and Morris Travers.The characteristic, brilliant red color that is emitted by gaseous neon when excited electrically was noted immediately; Travers later wrote, "the blaze of crimson light from the tube told its own story and was a sight to dwell upon and never forget."

  6. Metal-halide lamp - Wikipedia

    en.wikipedia.org/wiki/Metal-halide_lamp

    Some bulbs have a phosphor coating on the inner side of the outer bulb to improve the spectrum and diffuse the light. In the mid-1980s a new type of metal-halide lamp was developed, which, instead of a quartz (fused silica) arc tube as used in mercury vapor lamps and previous metal-halide lamp designs, use a sintered alumina arc tube similar to ...

  7. Pendant light - Wikipedia

    en.wikipedia.org/wiki/Pendant_light

    A pendant light, sometimes called a drop or suspender, is a lone light fixture that hangs from the ceiling usually suspended by a cord, chain, or metal rod. [1] Pendant lights are often used in multiples, hung in a straight line over kitchen countertops and dinette sets or sometimes in bathrooms.

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