Although I have and like my nightrider 750, and cygolight 210 mounted low on a Paul Gino light mount on my front rack, have to say that I really love the output of the cree light that [MENTION=21724]cyccommute[/MENTION] recommended above. Threw the battery pack in my front rack bag, and used it for the better part of a 2+ hour group gravel ride at night recently. It had a large beam of light that was sufficient for myself, and some under lighted other riders to see by. Really tickled with the light output, not to mention the low cost. I'd bought a second one to use head mounted for dog walking.