Led

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Starting from 2012, LEDinside, a division of TrendForce began to track global LED light bulb retail average selling prices (ASP). According to historical data, LED light bulb price dropped steadily ... READ MORE

A light-emitting diode ( LED ) is a two- lead semiconductor light source . It is a p–n junction diode , which emits light when activated. [4] When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons . This effect is called electroluminescence , and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor.

Like incandescent lamps and unlike most fluorescent lamps (e.g. tubes and compact fluorescent lamps or CFLs), LEDs come to full brightness without need for a warm-up time; the life of fluorescent lighting is also reduced by frequent switching on and off. [7] The initial cost of LED is usually higher. Degradation of LED dye and packaging materials reduces light output to some extent over time.

Led Zeppelin’s debut album, newly remastered, and including an additional CD and double LP featuring a previously unreleased October 1969 concert from Paris, France. [ read more... ]

Since we've put light and time on the same page, we could get into relativity here, but we won't because you're shopping for a reason. You need a clock to hang on your wall. Or an LED lamp to put on your desk. An alarm clock to wake you in the morning. A string of lights for your party. We have all of those and more, from Star Wars , Doctor Who - you name it!