I have had a Cygolite Expilion 400 for the past two years and am loving it. Its one of those USB rechargeable ones. It makes riding at night quite a joy. I used to have sub 100 lumen lights that let me be seen by traffic, but I sure couldnt see ahead to me! Dark rainy nights were just miserable. If you want to have a safe and happy night ride, I would totally reccomend something 350 lumens and up. Its amazing how far lighting tech has come in the last few years. No longer do you have to buy a 10 point setup with huge water bottle batteries and 2" headlights for $400! My Expilion is very small, lightweight, self contained, and hassle free. There are many more out on the market like it from established lighting companies like Dinotte and Niterider.