Define an LED(Light Emitting Diodes)
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A light-emitting diode (LED) is a two-lead semiconductor lightsource. It is a p–n junction diode that emits light when activated. When a suitable current is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons.
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they are preferred over balls as LED lamps have a long life and consume very little power the only problem is that their cost is somewhat high however there long life and low power conservation a great advantages there also very eco friendly
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