I hope I'm not too far off topic:
I've just started using one of
these.
It was an impulse buy. In the past I've used a light on my bars.
The (possibly perceived) problem was that I feared that cars coming out of side roads wouldn't see the light between my hands/arms using dropped handlebars. My solution was an extension to the bars. It worked well, putting the light higher and further ahead, but I wasn't happy with the crowded bars.
The fork light bracket solves that. However, I did have to get a longer brake bolt, as the bracket took up a few mm too many of the existing caliper screw. But, that done, I'm very happy with the bracket. It is solid and seems unaffected by road conditions.
If you're still reading, I'll add that I still have a light on the bars, but it's for seeing (it points to a spot 10' or so in front of me: I don't tend to ride in pitch black). The light on the fork is for being seen (so almost horizontal).