As a driver, I've never encountered bike lights that caused any problems. And I like bicyclists that use them as I often spot them from further away. I don't ride on paths and I don't understand why anyone would use lights on them during the day, but I haven't seen any issues with them on the road. I flash both front and rear during the day. The headlight stays on steady after dark. I ride mostly in rural areas and the one potential issue under those conditions are super bright rear flashers at night. But drivers have no problem with the low lumen rear flashers.