Light Emitting Diode (LED) is a semiconductor light source.  LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. Early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness.

LEDs present many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved robustness, smaller size, and faster switching.

Light-emitting diodes are increasingly used in applications as diverse as automotive lighting, advertising, general lighting, and traffic signals.

Modern high power LEDs are powerful enough for room, street and other lighting applications. Heat management is one of the major problems when using high power LEDs, for this reason high power LEDs are often mounted on metal-core printed circuit boards (MCPCB), heat conducted through the MCPCB is dissipated by convection and radiation.

For high reflectivity of  LED light a highly bright white solder mask is necessary which will also remain white through assembly processes and lifespan of the LED final product, a special super white solder mask is available for this particular application.