Around here they tend to attach flashing strobe lights bright enough to dazzle but no help in working out where they are in the road
I have those lights and i have tried them in just about every single mode. I use them properly in that they are angled downward so that they flash on the road ahead. They have steady high beam, steady low beam and flashing modes. I may as well ride without any light at all as i have video footage of drivers at roundabouts and junctions looking at me and then pulling out in front of me. They then slam the brakes on and signals as if it was my fault..... i also wear hi viz jacket, overshoes and a flashing front and back led on the top of my helmet. I cannot do anything else that is legal to improve my visibility to drivers but it is me who will be injured or worse when motorists don't pay attention to my presence.
I hate seeing cyclists without lights, it's my one pet hate. I berated one last night who also decided that riding on the wrong side of an unlit road without lights was a really good idea. Maybe Darwins theory is flawed in a modern society? Use the correct, lights, clothing, signals and follow the rules of the road and get killed, ride like a pillock in the dark without lights on and you will live. At least, that is how it seems to me.