solar LED street lights

Lighting accounts for about 20 percent of the total energy usage worldwide, approximately 1,944 terawatt hours. Because lighting is relatively simple to upgrade, the trend in recent years is to switch to LEDs. Doing so greatly improves energy efficiency, mitigating impacts of global warming and reducing energy dependence. What is an LED light? A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it. Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared light mainly used in remote-control circuits. The first visible-light LEDs were of low intensity and limited to…