I'm having a terrible time finding a rack-mounted tail light, since everything on the market these days seems to be designed to mount on a seat post or drop tube, or even on clothing. Can anyone recommend a tail light that is designed to be mounted on the rear rack using a bolt through the mounting hole provided on a rack?
I have removed the clip that comes with a bicycle taillight and screwed the light through the rack hole into the clip screw hole. That may make the taillight on-off switch too close to the rack to operate. I got around this by inserting a small tube between the light and rack, and using a longer screw through tube.