We are electrical installers specialized in LED and RGB lighting installations.
The RGB LED is an electronic component widely used in advertising panels formed by arrays of hundreds or thousands of these diodes. ... In the image you can see a diode of this type, containing three diodes red green and blue inside, their common connection is made by the cathode or anode

It comes from the English L.E.D (Light Emitting Diode) translated light emitting diode. It is a solid semiconductor body of great resistance that, when receiving an electric current of very low intensity, emits light efficiently and with high performance.