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2. Fluorescent-lamp formats - Wikipedia

   en.wikipedia.org/wiki/Fluorescent-lamp_formats

   Cross section of a typical fluorescent lamp with and without a reflector. Some lamps have an internal opaque reflector. Coverage of the reflector ranges from 120° to 310° of the lamp's circumference. Reflector lamps are used when light is only desired to be emitted in a single direction, or when an application requires the maximum amount of ...

3. 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]

4. Fire clay - Wikipedia

   en.wikipedia.org/wiki/Fire_clay

   Fire clay in a furnace. Fire clay is a range of refractory clays used in the manufacture of ceramics, especially fire brick.The United States Environmental Protection Agency defines fire clay very generally as a "mineral aggregate composed of hydrous silicates of aluminium (Al 2 O 3 ·2SiO 2 ·2H 2 O) with or without free silica."

5. Shop the best QVC Black Friday sales — including Oprah's ...

   www.aol.com/lifestyle/shop-the-best-qvc-black...

   QVC Black Friday kitchen & home deals. QVC. KitchenAid 5-Quart Tilt Head Glass Bowl Mixer. $360 $459 Save $99. ... Limitless AutoBoost 3-in-1 Jump Starter, Power Bank & Light. $47 $79 Save $32.

6. Timeline of lighting technology - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_lighting...

   1875 Henry Woodward patents an electric light bulb. 1876 Pavel Yablochkov invents the Yablochkov candle, the first practical carbon arc lamp, for public street lighting in Paris. 1879 (About Christmas time) Col. R. E. Crompton illuminated his home in Porchester Gardens, using a primary battery of Grove Cells, then a generator which was better ...

7. Montana legislators reject bathroom ban for transgender ...

   www.aol.com/news/montana-legislators-reject...

   (Reuters) - Montana legislators on Tuesday rejected an attempt to ban a transgender member of the state House of Representatives from using the women's restroom at the state Capitol, with some ...