Originally Posted by CliftonGK1

Where on the forks?

There are many different mounting options depending on the type of light you have. If it's a generator lamp, then you can hard-mount it to the fork crown with a bracket specifically for that purpose. I don't know of any crown mounting solutions for battery lights with typical bar-type mounts. But you can get something like the Minoura Fork Mount or Cronometro Nob which wraps around the fork blade and gives you a "bar sized" nub to mount stuff to.
If you have a hard-mountable lamp, you can do a mid-fork mount with a cateye light bracket, a long M4 bolt, some Presta valve knurled nuts as spacers and the spherical washers from a pair of brake shoes for adjustability. (I use that setup on one of my bikes.)
With mid-fork eyelets, you can get the Paul Gino and provide a mount point similar to the Minoura or Cronometro, but it's bolted right into an M5 threaded hole (like a rack or fender eyelet.)