I use a Cygolite Dash 450 front light and a Cygolite Hotshot for a rear light for day rides. They're both reasonably good lights. I've gotten good service from Cygolite products. The Dash 450 is a no-tools mount as well.

Several people in our group run the Dash 450. Our little peloton gets stretched out quite a bit at times. I can see the Dash 450s in my rear view mirror for quite a distance, at least a half mile or so.