A Breif Theory Behind LEDs

An LED (Light Emitting Diode) is an incredibly versatile light source that is found in many objects that we use daily.  In short, an LED is just a small light bulb that fits into an electric circuit, much like an incandescent bulb.  However, unlike their incandescent counterparts, LEDs have no filament, generate little to no heat and use a fraction of the energy that an incandescent bulb uses. LEDs are illuminated by the movement of electrons through a semiconductor material.  A semiconductor is a material with a varying degree of conductivity.  Most semiconductors are made of a material that has poor conductivity and has impurities added to it.  Almost every electronic device, from computers to traffic lights, has semiconductors in it.