Light Emitting Diode is the full name of LED. It is a semiconductor light source that converts electrical energy into light. See LED for its use in heavy-duty work and vehicle lighting. When forward current passes through the semiconductor junction, charge carriers release energy as photons. The semiconductor materials and phosphor system determine the wavelength and white-light characteristics. In a work light, an LED’s potential efficiency and lifetime can be achieved only when current regulation, optical control, sealing, mechanical protection, and thermal management are properly designed.