Yes, most street lights connect to the power grid of the city. The original power is 220/110 V AC, and the transformer within the light will change it to DC with a lower voltage. In this way, it takes advantage of the basic infrastructure of the city and makes management easier. However, there are also other ways of power supply in different places. For example, in some remote areas where it is hard to access the grid, the street lights are off-grid. These lights use solar power or the wind to generate light.
More reading: Village Solar Street Light: Benefits And Step-by-Step Guide
