I have the Beacon II tail/brake assembly from motorrad elektric, whichmakes you much more visible from behind. I think it's probably at it's best when riding into the sunset. Most old motorcycle tail/brake lights disappear when the sun is shining straight in your eyes.
Crash data shows that most of the danger you encounter is between 10 and 2 o' clock. Â A modulating headlight might help, as would making the front turn signals double as running lights, or maybe adding additional front/side lighting.
In the interest of increasing visibility, I wear a hi-vis yellow jacket with reflective patches/piping. Â Has shown noticeable improvements, especially in poor weather. Â It draws no power, would help make me visible if I broke down at night with no electrics/lights, and little kids think I'm the yellow power ranger.