Originally Posted by
Mark Mandolin
Firstly you can get an Ebike light that works from 12 to 100v and everything in between
ElectroLights - Product Info
And U.K. has some draconian laws on the books and I'm truly sorry for you.
Here in Canada rule is motor has to be 500w how you control it is up to you and where I live the police are way too busy to worry about me what with gang warfare shootings fentanyl crisis etc etc
Ultimately there is no right or wrong answer just personal preference.
It's not an eBike light, only a searchlight with mount adapter to put it on mtb's. Real (e)Bike lights are designed for road use like car headlights. This means a cutoff-beam shape, optics with hidden LEDs, air optimized cooling design and remote controls.
bikeforums.net/electronics-lighting-gadgets/435347-best-headlights-under-50-thread-33.html#post19987793
supernova-lights.com/en/products/e-bike-lights-45-kmh/
Since i'm not affected by UK laws, you don't have to be sorry (for me).
Many things are compromises.
For fenders these are optical expectations vs. practical advances.