How must a load be marked in darkness or bad visibility when it extends laterally more than 40 cm beyond the side lights of the vehicle?

When a load sticks out more than 40 cm beyond the side lights of a vehicle, it must be clearly marked so other road users can see it in darkness or poor visibility. According to German traffic rules, this marking includes a white light at the front to signal the extended part towards oncoming traffic and a red light at the rear to warn drivers coming from behind. This ensures the protruding load is visible from both directions, preventing accidents. Hazard warning lights are not sufficient because they alert generally to a hazard but do not specifically mark the exact edges of the extended load.