I see plenty of people on rides that have good lights and they are aimed 50 yards down the road, making the light pretty useless..

I use 2 lights and stagger them.. My thrower is aimed about 15-20 yards and my EDC-MCE light is aimed about 6-10 yards in front of me, so I have good vision of what is in front of me and down the road if an obstruction is in the road..

The amount of light needed is also dependent on how fast you prefer to ride at night..