Dogtrousers
Kilometre nibbler
I have a Busch and Muller Toplight D Permanant on the back of my rack as per the instructions. It is impossible to see if it is working while riding. (Except maybe in pitch dark or foggy conditions). I also run a Cateye Omni 5 under the saddle.I see them every time I look back. That's why they should be good broad lights mounted where you can see them. No specific looking at them is needed. Trying to get the two-poor-lights fans to understand this seems impossible!
Neither of these are poor lights. The B&M is StVZO compliant. I don't know if the Omni 5 is. And to be honest I don't give a stuff.