Reflective ankle straps are also great for increasing side visibility. The movement of your legs adds to their visibility.

Regarding helmet lights, I also have a Light & Motion Vis 360 and love it. Mine is the lower-powered version but it is bright enough for me even running on low because I am using it mainly to get drivers' attention rather than see the road. However, on high it is powerful enough to use as a backup light. I get more than 4 hours of run time off a charge. The taillight is very bright, and the entire unit is very light weight so you hardly even notice it.