What is the main role of... (12990)

What is the main role of the low-beam lights in a tractor?

1. Lighting of the road ahead of the tractor in a manner which does not cause the blinding of the drivers coming from the opposite direction.

2. Lighting of the road for no more than 10 m ahead of the vehicle.

3. Lighting of the road for at least 100 m ahead of the vehicle.