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Left to right: MR16 with GU10 base, MR16 with GU5.3 base, MR11 with GU4 or GZ4 base Line drawing of an LED MR16 lamp, with a heatsink rather than a reflector. A multifaceted reflector (often abbreviated MR) light bulb is a reflector housing format for halogen as well as some LED and fluorescent lamps.
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.
A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, to produce ultraviolet and make a phosphor coating in the lamp glow.
George Inman later teamed with General Electric to create a practical fluorescent lamp, sold in 1938 and patented in 1941. [6] 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.
Left to right: MR16 with GU10 base, MR16 with GU5.3 base, MR11 with GU4 or GZ4 base HIR/IRC "HIR" is a GE designation for a lamp with an infrared reflective coating. Since less heat escapes, the filament burns hotter and more efficiently. [138] The Osram designation for a similar coating is "IRC". [139]
[25] [26] The Western Australia Department of Fire and Emergency Services recommends that homeowners consider instead using cooler-running compact fluorescent lamps or light emitting diode lamps. [27] Halogen Torchère floor lamps have been banned in some places, such as dormitories, because of the large numbers of fires they have caused.
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