How do police lights work?

Police lights typically use LED or halogen bulbs to emit bright, attention-grabbing light in various colors, primarily red and blue, to signal their presence and alert other drivers. These lights are connected to the vehicle’s electrical system and can be activated through a switch inside the vehicle. The lights often operate in patterns or flashes to enhance visibility and convey urgency. In addition to serving as a warning, the specific colors and patterns can also communicate different messages to the public.