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ECE nominal luminous flux: 50 lm ±20% T10 size Old designation: W10/5 ANSI № 168 WR5W W2.1×9.5d 1 12 V & 24 V: 5 W Red WY5W W2.1×9.5d 1 6 V, 12 V, 24 V: 5 W Amber ECE nominal luminous flux: 30 lm ±20% W10W W2.1×9.5d 1 6 V & 12 V: 10 W T13 size WY10W W2.1×9.5d 1 6 V & 12 V: 10 W W15/5W WZ3×16q 2 12 V: 15 / 5 W for motorcycles W16W
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.
Fluorescent lamp tubes are often straight and range in length from about 100 millimeters (3.9 in) for miniature lamps, to 2.43 meters (8.0 ft) for high-output lamps. Some lamps have a circular tube, used for table lamps or other places where a more compact light source is desired.
Compact fluorescent mogul-base bulbs are also available, as are adaptors to allow medium-base bulbs to be used in mogul sockets. There are usually two three-way switches near the top of the floor lamp to operate the bulbs. One controls the three-way center bulb, and the other turns on one, two, or all three (or four) of the peripheral bulbs.
Below the 20% limit, the lamp may remain at 20% or flicker or the starter circuitry may stop and restart. [60] Above 80%, the bulb may operate at 100%. However, recent products have solved these problems so that they perform more like incandescent lamps. Dimmable CFLs are more expensive than standard CFLs due to the additional circuitry.
These lamps use a bi-pin connector for power: 12-volt MR11 bulbs usually use a GU4 base, and 12-volt MR16 bulbs usually use a GU5.3 base. The common 12-volt MR16 lamps, therefore, require a ferromagnetic or electronic transformer —sometimes misnamed as a ballast —to convert the 120- or 230-volt mains voltage to the extra-low voltage ...
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