On the N18 near Groenlo it is snowing hard and it is dark. You see little of the road ahead and no one is coming towards you. What do you do with your lights?
Full beam on, because in snow in the dark you see further that way
Full beam on, because without oncoming traffic it bothers no one else
No full beam: it reflects off the flakes and blinds you
Explanation
False — you think more light gives more sight in snow. During snowfall you do not use full beam: the reflection on the snowflakes blinds you, so you actually see less (Book p.194).