Even though it looks like a simple part, it requires 5+1 operations and a custom fixture. Quite a lot of work to just mount turn signals.
Brackets are designed to similar shape as triple clamps. So that they would look like extensions and not separate parts.
For this project I want high power lights all around as Harley-Davidson LED headlight came with the motorcycle. For that reason, I used Shin-Yo high power LED turn signals (204-080). At the moment I am happy with the amount of light they emit.