Thanks. Looks like Serfas doesn't cut it either. I spent some time reading this thread: http://www.bikeforums.net/electronic...ytime-use.html and the consensus seems to be that a good daytime light starts with something like 60 lumens. At least that the point where the manufacturers are starting to make such claims. I'll probably be getting Cygolite Hotshot Pro 80. It has the best battery life plus I've had a pretty good experience with the original Hotshot and all four of my bike have mounts for it.