The Kalenji Run Light - Sits at a suitable height on the body so as not to cause too much glare towards oncoming people with its 3 mode very bright light, however - 1) getting a comfortable position on your body without it moving around is difficult, and would be better with a second shoulder strap for stabilisation. 2) a small 'shade' over the top of the light would stop the glare going up to your own eyes. 3) it would be much better if the rear light could be switched off when running in a group, as the flashing red light is just too bright for people behind. I've had to resort to sticking black tape over most of it to avoid causing annoyance. For a solo runner in the winter however, it's probably just what you need.