To begin, a light-emitting diode (LED) is a two-lead semiconductor light source. LEDs have many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster switching.
Common LED colors include amber, red, green, and blue. LEDs are now being incorporated into bulbs and fixtures for general lighting applications. LEDs are small and provide unique design opportunities. Some LED bulb solutions may look like familiar light bulbs and some may not but can better match the performance of traditional light bulbs. Some LED light fixtures may have LEDs built–in as a permanent light source.
LEDs are directional light sources. For this reason, LED lighting is able to use light and energy more efficiently in many applications.