Wow, it never occurred to me to replace my fender reflector. I think Dutch Bike sells the Pixeo, or a similar one from Spanninga, so I can ask them about that.

The Lumotec Retro looks great, and I can mount it up high above the rack, but it's a dynamo-driven light, and I don't have a dyno hub. I have disc brakes, but no dyno hub. Is there a battery version?