Which of the control lights in the illustration informs you that the dipped headlights are turned on?

The illustration shows three green warning lights: A - two arrows pointing left and right, B - a symbol of two small lamps with rays, C - a headlamp with rays pointing diagonally downwards. Light C shows that the dipped headlights (low beam) are on - answer C. The arrows (A) are the indicators, and symbol B means the sidelights (position lights).

The Regulation on the technical conditions of vehicles allows a green, non-flashing control signal for dipped headlights, and requires such a signal for sidelights - that is why both lights are green and you have to tell them apart by the symbol. The key is the rays: for dipped headlights they slope downwards, because this is exactly how the beam is directed, lighting the road and not dazzling oncoming drivers; for main beam the rays are horizontal and the warning light is blue. The Road Traffic Act requires you to use dipped headlights when driving at all times of day and night, and in the daytime, in normal visibility, allows you to replace them with daytime running lights. A glance at the green light with diagonal rays assures you that you are driving with the correct lights, and not only with the sidelights, which do not light the road.

Legal basis: Annex No. 6 to the Regulation on the technical conditions of vehicles and the scope of their necessary equipment; Art. 51 para. 1 and 2 of the Road Traffic Act (Prawo o ruchu drogowym)