An san LED a matsayin ƙarni na huɗu na tushen hasken wuta ko tushen hasken kore, tare da halaye na ceton makamashi, kariyar muhalli, tsawon rayuwa, ƙaramin girman da sauransu. Ana amfani da shi sosai a fannoni daban-daban kamar nuni, nuni, ado, hasken baya, hasken gabaɗaya da birane ...
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