Because the related department has changed the old street lights into LED ones. Most of the traditional street lights are HPS lights, which emit light from sodium vapor, which is orange or yellow. The new LED street lights are designed to emit white light. Although LED lights themselves emit blue light, street lights can produce white light by using the phosphor on the lampshade. LED street lights can also change the color temperature and create warm white light, which is similar to orange light and protects our eyes.
More reading: LED Street Lights VS HPS Street Lights: What’s Better in 2023?
