I pay attention to what works best when I see a cyclist while I'm driving my car. A reasonably low lumen slow blinkie, and hi-viz shirt always registers quickly and easily without being annoying. Excessively bright lights and unusual blinkies, while very noticeable, cause me to stare at the cyclist in a bad way, and I'm a big believer in target fixation. I don't like using front lights, except to illuminate the road - I prefer to control the risks in front of me.