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A general lighting service 48-inch (1,219 mm) T12 [31] lamp operates at 430 mA, with 100 volts drop. High-output lamps operate at 800 mA, and some types operate up to 1.5 A. The power level varies from 33 to 82 watts per meter of tube length (10 to 25 W/ft) for T12 lamps. [32]
Pink, daylight, green, and yellow fluorescent light 4 ft (122 cm) high 5 3 43 [47] untitled (to Mr. and Mrs. Thomas Inch) 1964 Pink, daylight, cool white, and yellow fluorescent light 8 ft (244 cm) high 3 3 Crystal Bridges Museum of American Art, Bentonville, Arkansas [48] 44 [47] untitled (to Mr. and Mrs. Thomas Inch) 1964
Original 4–13 W miniature fluorescent range from 1950s or earlier. [1] Two newer ranges, high-efficiency (HE) 14–35 W, and high-output (HO) 24–80 W, introduced in the 1990s. [2] Panasonic's range of FHL fluorescent tubes in 18W, 27W, and 36W varieties for the Japanese market. Circular fluorescent tubes.
Some linear fluorescent lamps contain reduced mercury (as low as 1.7 mg) [22] and are typically termed as "Green" and are recognizable by their green caps/tips. [ 23 ] The U.S. EPA states that using energy-efficient CFLs reduces demand for power, which reduces the amount of coal burned by power plants and hence reduces the amount of mercury ...
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]
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 March 2025. Device for producing light from electricity For other uses, see Electric light (disambiguation). "Electric lamp" and "Light bulb" redirect here. For the furniture, see light fixture. For the album, see Lightbulbs (album). For the film originally titled "Lightbulb", see Ingenious (2009 ...
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