The most useful clues are the light’s location, its pattern, and the type of vehicle displaying it. Even then, it’s best to avoid assumptions about a driver’s identity or legal privileges based on lighting alone.
If you notice green lights on your own vehicle, consult the owner’s manual. If they’re installed on the exterior, check local rules before using them on public roads.
Have you seen a car with unusual green lights recently? Where were the lights located—on the dashboard, beneath the vehicle, or around the grille? That detail can help narrow down what they might mean.
