The lights are from Adjure: http://www.adjureinc.com/be2ledwismch.html

You would need to machine a custom hollow mounting stud (5/16-24)

They come in amber or red and can be used as a brake light/turn signals.

These would work with the existing M10 stud:

https://school-of-cool.com/en/?product_cat=tail-lights-turn-signal-custom

2016 M3W, Army Green Matte/Tan Leather, 17k miles