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A compact fluorescent lamp (CFL), also called compact fluorescent light, ... LED prices fell well below US$5 for a basic bulb in 2015. [19] In the United States, ...
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.
The report claimed that due to outdoor lighting and air conditioning use in summer months, there is a net cost saving from changing to compact fluorescent lighting in all climates. [169] The cost of CFL and LED bulbs has decreased greatly since 2008, which shortens the time needed to pay off their initial cost.
Cross section of a typical fluorescent lamp with and without a reflector. Some lamps have an internal opaque reflector. Coverage of the reflector ranges from 120° to 310° of the lamp's circumference. Reflector lamps are used when light is only desired to be emitted in a single direction, or when an application requires the maximum amount of ...
As of 2011, incandescent lighting was the most common type used in homes, delivering about 85% of household illumination. [2] To produce light, incandescent light bulbs convert electricity to heat, heating a filament to the point where it glows; a portion of the heat is thus converted to light.
Invention of the world's first compact metal halide lamp in the popular MR16 format, as an energy efficient alternative to the halogen MR16 lamp for commercial lighting. [14] 2007 — MiniLynx Fast Start; Introduction of the first compact fluorescent lamps to feature almost instant light at switch-on without reducing lamp lifetime. 2008 ...