These days I run a k-Lite Bikepacker Ultra MTB version running off a SON28 dyno.
https://jefe.bike/collections/klite-...lite-wire-loom
I have been looking at a Gloworm light for a helmet light, as it has USB-C end to end with a separate power bank, opening up possibilities with being able to use off the shelf USB-C cables.
https://www.glowormlites.co.nz/produ...lightset-g2-0/