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2. Longest-lasting light bulbs - Wikipedia

   en.wikipedia.org/wiki/Longest-lasting_light_bulbs

   The fifth-longest-lasting light bulb was located in a fire house in Mangum, Oklahoma. It was installed circa 1926–1929. The bulb was not attached to any special electrical supply, and when the power went off, so did the bulb. [2] The firefighters in Mangum were willing to show visitors the light bulb as long as they were not busy with ...

3. Centennial Light - Wikipedia

   en.wikipedia.org/wiki/Centennial_Light

   Centennial Bulb in fire station 6. Several reasons have been cited for the bulb's extensive lifespan. Its continuous operation has largely eliminated the stresses associated with turning a light bulb on and off, the act of which causes the temperature of the bulb to increase and decrease.

4. Aerolux Light Corporation - Wikipedia

   en.wikipedia.org/wiki/Aerolux_Light_Corporation

   Aerolux bulbs consumed about 3-5 watts of power. The bulbs had high yield of light produced versus electricity consumed, generally in the range of 50-60 lumens/watt, compared to 12-18 lumens/watt for a tungsten filament incandescent bulb. [9] [failed verification]

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6. 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

7. Compact fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Compact_fluorescent_lamp

   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]