Whether LED can replace traditional lamps depends on whether the comprehensive performance of LED exceeds the traditional light source, and whether it has long-term cost effectiveness. In general, LED will bring a new revolution to artificial lighting, and become a new light source that surpasses the existing light source. It has great potential for development and market prospects. The LED street lamp has been gradually rejected and tried from the initial rejection, but the LED street lamp has a long way to go to replace the traditional light source.