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  2. Centennial Light - Wikipedia

    en.wikipedia.org/wiki/Centennial_Light

    The pendant light at Fire Station #6 in which the bulb is installed. The Centennial Light was originally a 60-watt bulb, but has since dimmed significantly and is now as bright as a 4-watt bulb. [7] [8] [9] The hand-blown, carbon-filament common light bulb was invented by Adolphe Chaillet, a French engineer who filed a patent for this socket ...

  3. Longest-lasting light bulbs - Wikipedia

    en.wikipedia.org/wiki/Longest-lasting_light_bulbs

    The world's longest-lasting light bulb is the Centennial Light located at 4550 East Avenue, Livermore, California. It is maintained by the Livermore-Pleasanton Fire Department . The fire department claims that the bulb is at least 124 years old, having been installed in 1901, and has only been turned off a handful of times.

  4. 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

  5. Battery holder - Wikipedia

    en.wikipedia.org/wiki/Battery_holder

    By the 1920s, battery holders used twin metal clips (like fuse holders) to hold the battery in place while making electrical contact. Patent no. 1439429 was granted in Dec. 1922 for an assembly with two spring arm clips, a small switch, and a lamp assembly on the end of connected wires.

  6. Planned obsolescence - Wikipedia

    en.wikipedia.org/wiki/Planned_obsolescence

    On a device with a sealed back cover, a manual battery replacement might induce permanent damage, including loss of water-resistance due to damages on the water-protecting seal, as well as risking serious, even irreparable damage to the phone's main board as a result of having to pry the battery free from strong adhesive in proximity to ...

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