Originally Posted by sauerwald

I have two bikes with fork mounts for the headlights (both Dynamo powered lights), both mounts work well.

Bike one has a Planet Bike Blaze headlight which is mounted to a Paul 'Gino' mount (http://www.paulcomp.com/ginolightmount.html). In the picture on the site, he shows it mounted down by the wheel axle, in my case, it is mounted to a braze-on which is about half way up the fork. This ought to work fine for any bike with a braze-on on the fork.

Bike two has a Supernova E3 161-S headlight (also a shaped beam), which i mounted to a braze on half way up the fork with a long bolt, and a spacer that I custom cut from a piece of aluminium tubing. I used lock washers on either side of the spacer, and it seems to work fine. FWIW, I use home-made spacers from aluminium tubing for a lot of stuff, you buy a piece of the tubing, and can then cut it with a tubing cutter to whatever length you need.

Mark