Iitayile zasemva emva kwetrakhi zisetyenziselwa ukuhambisa injongo yomqhubi yokuqhekeza nokujika kwezi zithuthi zilandelayo, kwaye zisebenza njengesikhumbuzo kwezi zithuthi zilandelayo. Badlala indima ebaluleke kakhulu kukhuseleko ezindleleni kwaye zibalulekile kwizithuthi.
I-LED yidayode ekhupha ukukhanya, isixhobo semiconductor esomeleleyo, esinokuguqula ngokuthe ngqo umbane ube kukukhanya, okwahlukileyo kumgaqo okhupha ukukhanya kwezibane ze-incandescent kunye nezibane ze-fluorescent esiqhelene nazo. I-LED inezibonelelo zesayizi encinci, ukungqinisisa ukungcangcazela, ukonga umbane kunye nobomi obude.