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  2. Light tube - Wikipedia

    en.wikipedia.org/wiki/Light_tube

    The transmitted light varies over the day; should this not be desired, light tubes can be combined with artificial light in a hybrid set-up. [ 27 ] [ 44 ] [ 45 ] [ 46 ] Some artificial light sources are marketed which have a spectrum similar to that of sunlight, at least in the human visible spectrum range, [ 47 ] [ 48 ] [ 49 ] as well as low ...

  3. Erika Rosenberg - Wikipedia

    en.wikipedia.org/wiki/Erika_Rosenberg

    Erika Rosenberg was the key note speaker at the International Congress of Education in Tullahoma, ... Where Light and ... When I was with the Pope in the tube, Langen ...

  4. Fluorescent-lamp formats - Wikipedia

    en.wikipedia.org/wiki/Fluorescent-lamp_formats

    Designed to run on the existing 125 W (240 V) series ballast but with a different gas fill and operating voltage, the tube operated at only 100 W. Increased efficiency meant that the tube produced only 9% lumen reduction for a 20% power reduction. [7] This first energy-saving tube design remains a T12 tube even today.

  5. Fluorescent lamp - Wikipedia

    en.wikipedia.org/wiki/Fluorescent_lamp

    Fluorescent tubes are long, low-luminance sources compared with high intensity discharge lamps, incandescent and halogen lamps and high power LEDs. However, low luminous intensity of the emitting surface is useful because it reduces glare. Lamp fixture design must control light from a long tube instead of a compact globe.

  6. WKTH - Wikipedia

    en.wikipedia.org/wiki/WKTH

    WKTH (88.5 FM) is a K-Love affiliated radio station licensed to the city of Tullahoma, Tennessee. It is owned by Educational Media Foundation . The station broadcasts at 88.5 FM with an effective radiated power output of 1,900 watts as authorized by the Federal Communications Commission .

  7. Tullahoma, Tennessee - Wikipedia

    en.wikipedia.org/wiki/Tullahoma,_Tennessee

    Tullahoma was founded in 1852 as a work camp along the new Nashville and Chattanooga Railroad.Its name is derived from the Choctaw language, and means "red rock".. An alternative explanation (see Sam Davis Elliott's Soldier of Tennessee and sources cited therein) of the name is that Peter Decherd, who donated the land for the railroad right-of-way (and was therefore given the right to name two ...