The term LED is the acronym of “Light Emitting Diode”, that is “light emitting diode”. The led operation is based on the phenomenon known as “electroluminescence” due to photons emission (in the range of visible and infrared) caused by the electrons and the vacuums recombination when the junction is in forward biased conditions. LED technology is the evolution of solid-state lightning where light creation is obtained through semiconductors rather than using a filament or a gas. Led lightning is more energy-efficient, has longer duration and is more sustainable. In this way it allows innovative and creative solutions to use in industrial, road transport and domestic environments. That is why LEDs are the cleverest, most functional and sustainable light source.