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Georges Claude, a French engineer and inventor, presented neon tube lighting in essentially its modern form at the Paris Motor Show, December 3–18, 1910. [4] [5] [6] Claude, sometimes called "the Edison of France", [7] had a near monopoly on the new technology, which became very popular for signage and displays in the period 1920–1940.
WAC Air Controller painting by Dan V. Smith, 1943. The Women's Army Corps (WAC; / w æ k /) was the women's branch of the United States Army before 1978. It was created as an auxiliary unit, the Women's Army Auxiliary Corps (WAAC), on 15 May 1942, and converted to an active duty status in the Army of the United States as the WAC on 1 July 1943.
1841 Arc-lighting is used as experimental public lighting in Paris. 1853 Ignacy Łukasiewicz invents the modern kerosene lamp. 1856 glassblower Heinrich Geissler confines the electric arc in a Geissler tube. 1867 Edmond Becquerel demonstrates the first fluorescent lamp. [6] 1874 Alexander Lodygin patents an incandescent light bulb.
Most modern ballasts are now also equipped with a dimmer, which uses pulse-width modulation to dim the lamp up to 50%, or as much as one stop of light. Unlike a tungsten-based light, which has a negative color temperature shift with a drop in power, the mercury emission spectra takes over with a drop in power (approximately 200 K bluer at 50% ...
The history of electric light is well documented, [11] and with the developments in lighting technology the profession of lighting developed alongside it. The development of high-efficiency, low-cost fluorescent lamps led to a reliance on electric light and a uniform blanket approach to lighting, but the energy crisis of the 1970s required more design consideration and reinvigorated the use of ...
Wall-mounted light with shadows. Forms of lighting include alcove lighting, which like most other uplighting is indirect. This is often done with fluorescent lighting (first available at the 1939 World's Fair) or rope light, occasionally with neon lighting, and recently with LED strip lighting. It is a form of backlighting.