Why do you need fog lights? Fog lights, fog lamps, mount below the headlights and provide a wider light dispersion pattern. That means fog lights provide more light down low and to the side of the car, truck, van or SUV. The end result is better, brighter light in adverse weather conditions without blinding you and other oncoming drivers. Serious drivers know the value of fog lights, which is one of the reasons they're so common on high-end vehicles: Whether you're cruising the Autobahn, Main Street, fog lights improve safety, and that's good for everyone.