A light source created by a gentle emitting diode (LED). For decades, LEDs have been used as indicator lights on myriad products; nonetheless, starting in the 2000s, they started to substitute incandescent, halogen and CFL fluorescent bulbs. LEDs draw considerably less power and are up to 80% extra efficient, and they can final from 10 to 20 years. Companies proceed to experiment with quite a few designs. For instance, when pink, inexperienced and blue LEDs are combined, they produce white gentle. Another technique uses a blue LED and yellow or pink phosphors. For a long time, EcoLight LED bulbs bulbs had been a lot dearer than incandescents; nonetheless, right this moment, they are much cheaper and are the first family bulb know-how as incandescent bulbs, at the least the common lamp variety, had been banned in the U.S. Typically, LED bulbs are very reliable and deliver excellent mild, but people can encounter a buzz or flicker when they're used with old dimmer switches. In addition, LED bulbs emit varied shades of white, and patrons must read the packaging info (see color temperature). See incandescent bulb, halogen bulb, fluorescent bulb, Acandescent bulb, OLED lighting and LED.