The bright future of LED lighting
Although sales will continue for as long as inventory remains, worldwide production of incandescent lights (lamps) has mostly been phased out by the push for more energy-efficient lighting and improvements in light-emitting diodes (LEDs) and compact fluorescent lamps (CFLs). Between 2009 and 2015 the price of an LED lamp as bright as a 60-watt incandescent lamp dropped from U.S. $70 to $10. Meanwhile, the efficiency (or efficacy) of LEDs for turning power into light (as measured in lumens per watt) increased, as did their working lifetime, which greatly lowered their effective operating costs. See also: Fluorescent lamp; Illuminance; Illumination; Incandescent lamp; Lamp; Light-emitting diode; Luminous efficacy; Luminous efficiency; Luminous flux