Someone suggested that I wear my hiking LED light strapped to my helmet with the light on the back side and pointed down to illuminate my hi viz clothing. Anyone do this?

I sit upright on my hybrid, and the light does shine downward, and not into the eyes of someone who's behind. Probably not so good for those who use drop down bars. Btw, I've got a Nutcase helmet with a smooth surface, so it's easy to strap the light on. I'm looking forward to trying it out tomorrow a.m.