The main types of light sources used in traditional street lighting are: metal halide lamps, high pressure sodium lamps, incandescent lamps, and energy-saving lamps (compact fluorescent lamps). Among them, high-pressure sodium lamps have the advantages of high luminous efficiency, energy saving, and moderate color temperature, and are the most widely used in street lamps. However, LED street lamps have more advantages than high-pressure sodium lamps.

　　 Economic evaluation of LED street lights

　　Scientific comparison data of LED street lights and traditional street lights

  for reference only!

Assuming that there are three sections of roads in a city with lengths of 3 kilometers, 5 kilometers, and 10 kilometers, and road lights are laid every 30 meters with one on each side, the total number of street lights required for these three sections is 202 and 333 respectively. , 666 lamps, traditional street lamps are subject to 250W high pressure sodium lamps, and LED street lamps are subject to 50W power for comparison!

　　Light source cost comparison

The unit price of traditional street lights is 1000 yuan/light, and the unit price of LED street lights is 3000/light. The light source costs required for laying traditional street lights with three lengths of roads are: 202*1000=202000 yuan, 333*1000=333000 yuan, 666*1000 = 666,000 yuan, the cost of the light source needed to pave the road with three lengths of LED street lights are: 202*3000=606000, 333*3000=999000, 666*3000=1998000