• A couple of left-field ideas that I've mused on for rear lights:

    The best way to allow drivers to judge closing speed is to have two or more distinct light sources, since these will visually diverge as you close. I think you can already get a light bar, but it might be an idea worth tinkering with to improve. For example a lightweight horizontal beam with a light at each end.

    Secondly aircraft carriers have an system of lights that indicate to pilots their angle relative to the desired glides path. I wondered whether a similar thing could be designed for a bike to show extra lights to drivers if they are too close or change the display when they are passing with enough clearance.

    No idea about the feasibility of these. Just idle speculation.

  • +1 for proximity warning. Getting brighter or simple flash mode. Could be directional according to threat.

    Guess you just don’t want anything that could distract or confuse drivers or other cyclists at critical moments like an overtake.

    Related: Good to see more lights on the market with braking indication too (accelerometers)