The most commonly used light source in the early days of street lamps is high-pressure sodium lamps, which have golden yellow light when lit, good fog transmission performance (especially in the foggy northern region), high light efficiency (90LM-140LM), power (150W/250W/400W), and many choices, which is the {sx} of the early street light source. Some customers also use gold halide lamps (lit with white light), high-pressure mercury lamps, electrodeless lamps, energy-saving lamps. Mainly to see the needs of use, with the continuous popularity of LED, the light source of street lamps is mainly LED street lamps, and the theoretical life of 20000H.