Ow! Ow! shut it off ! I asked you to aim it at Hawaii.

Have you ever noticed the shades or hoods used on school buses to shield the sun from shining directly on the flashing lights ? It makes them easier to notice. Possibly by having that area dark when it is off between flashes?
Maybe even better in daylight without any more light power? Not sure, but it seems logical. I think daylight visible tailights can be a life saver in traffic.