Many have tried to mount lights down low on the front reflector brackets and had metal fatigue crack them. I had hoped that mounting to the more forward fender bolts would be adequate, but not for me. It took longer but the bracket behind the fender broke and then the weight all went to the fender plastic and broke that as well. First the left side (which I repaired) and now the right side.
So I ordered a set of brackets from Twisted Throttle, and they seem quite stout. Made of powder coated steel which is 1/4 inch thick, I think they should hold up. I'll report back here after the install (probably not until Jan '18).
For those still using fender mounts, I suggest perhaps filling the hole in the middle of
the bracket with some epoxy putty. That may dampen vibrations and delay or prevent metal fatigue. Perhaps some engineering types can speculate on the chance of success in this area or offer other suggestions? It is made of aluminum, perhaps fabricating a new one out of steel would be better?
Anyway, I also had Hyper-Whites (white LEDS)
on top of my Denali D1 lights so that added a little extra weight to add to my problem. Although I suspect that their extra aerodynamic load to the mount far exceeded their additional weight effect as they don't weigh that much compared to the light below them.
as yet to be mounted brackets from Twisted Throttle