I have the 1/2 watt PB Blaze helmet-mounted just for the 'see-me and please don't run over me' effect. I mostly use it when going through intersections or along busy streets; it is easy to turn off with gloved hands, so when I ride on sections of the MUP, I can quickly turn it off. It is bright enough to get noticed, but not quite enough to blind. Recommended. YMMV