I second the Cygolite Metro and Hotshots. I use them as daytime lights and they are bright as heck in full sun. I can't even imagine how bright they are in the dark.

Battery life on both is good and there are plenty of mode choices for different situations. I spent a ridiculous amount of time shopping and researching lights a year or two ago. After I bought these, I realized that just about anything with similar specs would have been more than enough. Don't waste time overthinking lights. Buy the Cygolite Metro for the front (I have the 800 and it's killer bright) and the Cygolite Hotshot (I've got the 150) for the rear and you are done.