How do the street lights come on when it gets dark and going off when light?

Street lights typically operate using a light-sensitive device called a photocell or photoresistor. When it gets dark, the photocell detects the drop in ambient light levels and sends a signal to turn the street lights on. Conversely, when dawn breaks and light levels increase, the photocell signals the lights to turn off. This automatic system ensures that the lights operate efficiently, illuminating streets only when needed.