LED, also known as diode, is a solid-state semiconductor device that can convert electric energy into visible light. Now more and more devices use LED. Solar LED street lamps use LED as lighting source, the main focus is on the energy-saving lighting effect of LED, so where is the energy-saving lighting performance of LED? 1. High-efficiency energy-saving low-voltage drive and ultra-low power consumption, the conversion of luminous power is close to 95 or more, and LED light source saves 60- More than 80, and flexible and convenient installation, durable and reliable; 2. The green and environment-friendly LED light has no ultraviolet rays and infrared rays, no radiation, soft illumination effect, no stroboscopic light, and can be turned on frequently. It is a real green and environment-friendly lighting source, moreover, LED lighting does not generate heat and does not contain harmful elements such as mercury and xenon; 3. The ultra-long service life has strong earthquake resistance and dust prevention performance, small required voltage and current, less luminous heat, no potential safety hazard, high safety factor, and LED lighting belongs to solid light source, epoxy resin packaging makes the luminous body part not easy to loosen, and there are no defects such as easy burning of filament, thermal deposition and high light decay. The service life can reach 30 thousand to 50 thousand hours, which is 30 times that of ordinary bulbs, it is equivalent to three years of uninterrupted lighting. Therefore, the energy-saving effect of LED light source lighting is very good. The Solar LED street lamp combined with solar power generation system is an ideal energy-saving lighting equipment.