The ultimate minimalist taillight is the from Busch & Mller. The symbol is pronounced meuw, as in what your cat says to you when it's hungry. And stands for micro, so from here on I'll just call it the Micro taillight, lest anyone think I'm a hungry cat. The Micro has a beautiful aluminum housing, anodized silver or black, to match their IQ-X and IQ-XS headlights. Of course they work with all other Busch & Mller dynamo headlights, as well as many other brands of headlights such as Schmidt. The Micro comes with two mounts; one for fender mounting as shown in the photos, and another for mounting to a seat post or a frame tube such as a seat stay. As of this writing, April 18, 2019, I don't have a photo showing the seat post / seat stay mount.