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In the 1970s, Thorn Lighting introduced an energy-saving 8 ft retrofit tube in Europe. 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 ]
Fluorescent light fixtures cannot be connected to dimmer switches intended for incandescent lamps. Two effects are responsible for this: the waveform of the voltage emitted by a standard phase-control dimmer interacts badly with many ballasts, and it becomes difficult to sustain an arc in the fluorescent tube at low power levels.
Daylight and warm white fluorescent light 9 ft (274 cm) high, 3 ft (91 cm) wide 3 0 361 [273] untitled: 1975 Daylight and warm white fluorescent light 9 ft (274 cm) high, 3 ft (91 cm) wide 3 0 362 [273] untitled (to Ellen aware, my surprise) 1975 Pink, blue, and green fluorescent light 8 ft (244 cm) square across a corner 5 2
Dia Bridgehampton is a museum in Bridgehampton, New York run by the Dia Art Foundation.Opened in 1983 as the Dan Flavin Art Institute, the building was renovated by Dia, under the direction of minimalist sculptor Dan Flavin, as a permanent display of his fluorescent light works in a single-artist museum.
A foot-candle (sometimes foot candle; abbreviated fc, lm/ft 2, or sometimes ft-c) is a non-SI unit of illuminance or light intensity. The foot-candle is defined as one lumen per square foot. This unit is commonly used in lighting layouts in parts of the world where United States customary units are used, mainly the United States. [ 1 ]
Fixture manufacturing began soon after production of the incandescent light bulb. [citation needed] When practical uses of fluorescent lighting were realized after 1924, the three leading companies to produce various fixtures were Lightolier, Artcraft Fluorescent Lighting Corporation, and Globe Lighting in the United States.