I have a Niterider non-digital evolution light, which came with both a handlebar mount as well as a helmet mount. Since I have 3 bikes, I just mounted it on an extra helmet, so no need to fuss with moving the mount. I read somewhere that using the helmet mount allows you to "flash" drivers, if needed to get their attention, and I found that to be helpful at times. Drivers are not really looking for bikes at night, so being able to flash my light in their direction helps to get them to notice me. Also, it's a fairly bright light, so it does light up the road. Having it on the helmet lets me shine the light at what I want to see.

Also, do you have a rear light? I like the flashing LED kind. I have a mount for the seat post, but usually just hook it on my Camelbak or on the panniers if I'm commuting and not using the Camelbak.

I'd like to get those little lights that go in the handlebars--those look cool. But I'm not sure how much they really add to your visibility. Anybody have them and know how bright they are?

Everybody stay visible and stay safe out there!