LED 101 – A Primer on Light Emitting Diodes

LED which stands for light emitting diode, is a semiconductor lightning source that uses visible, ultraviolet and infrared wavelengths to emit very bright light.

When LED is switched on the electrons inside the device release photons and emits the color of light corresponding to the value of the energy released by the photon. This process is called electroluminescence.

Light emitting diodes have been around since the 1960s being used primarily to produce low-intensity red light. Nowadays the applications using LED or light emitting diodes run the whole gamut of lighted signages, traffic signs, in-dash indicators, vehicle headlights and tail lights, digital LED signs, running text displays and many more.

The industry where LED is probably most widely used is advertising. This is because of the wide range of advertising spotlights possibilities that this may offers. An advertiser can actually choose to use make full use of LED’s many capabilities in coming up with complex signs or digital displays that cover the whole spectrum of the three LED wavelengths.

Aside from LED signs and digital LED signs that are very common these days, light emitting diodes are also used in simple and practical applications by artists (to light up works of art), modernist sculptors (to come up with sculptures that focus on the interplay of light and colors) and even homeowners to light up holiday decorations with a multitude of twinkling lights.

The popularity of light emitting diodes in LED signs and everyday practical applications comes from the fact that it consumes a lot less energy that traditional lighting sources and is now priced competitively against the usual incandescent bulbs. What is more, LED in a LED sign or a vehicle’s lighting circuitry has been proven to last longer and is more durable than the usual bulbs that feature a lot less character than LED bulbs do.