I have been happy using a MiNewt 350 for several months on my morning commute. It has the USB charger, and several brightness settings. I'll run it on low to not "blind" joggers if there are good street lights. When the trail is dark, I turn it on high and can see everything I need to see (potholes, deer, ninjas, etc.). I recommend you also have a second light with you for emergencies (although I've never needed one, it provides peace of mind).