Mounting the front light further away from your line of sight makes it easier to interpret the road surface? (Depth perception, visible shadows etc.)
This only applies if you need the light to see by - if you want to be seen, then handlebar height is probably better.
I'm sure this came up in discussion a few years ago, but I can't find it now. Part of it was to do with left or right fork - illuminating the edge of the road or oncoming traffic - with no clear conclusions...
Mounting the front light further away from your line of sight makes it easier to interpret the road surface? (Depth perception, visible shadows etc.)
This only applies if you need the light to see by - if you want to be seen, then handlebar height is probably better.
I'm sure this came up in discussion a few years ago, but I can't find it now. Part of it was to do with left or right fork - illuminating the edge of the road or oncoming traffic - with no clear conclusions...