Gee whiz. If you could stretch your budget out to $27. You could get the best light out there. A Romisen RC-N3 Cree Q5 from
http://www.shiningbeam.com/servlet/t...CREE-Q5/Detail. And attach it to your handlebars like this.
http://www.youtube.com/watch?v=HrfZhEzjWwg