LED stands for Light Emitting Diode. LED lighting products produce light approximately 90% more efficiently than incandescent light bulbs. LED works when an electrical current passes through a microchip, which illuminates the tiny light sources we call LEDs, and the result is visible light. To prevent performance issues, the heat LEDs produce is absorbed into a heat sink.
The useful life of LED lighting products is defined differently than Incandescent or Compact Fluorescent Lighting (CFL). LEDs typically do not “burn out” or fail. Instead, they experience ‘lumen depreciation,’ wherein the brightness of the LED dims slowly over time. Unlike incandescent bulbs, LED “lifetime” is established on a prediction of when the light output decreases by 30 percent.