I use a CygoLite Rover II that has 255 lumens in the high setting which is almost too much light. I run it in the medium setting which is still probably well over 200 lumens, but gives significantly more battery time. This is the exact model I have. The good is that this particular model has a rapid charger (about 2 hours). The bad is that the battery is packaged to fit in a water bottle cage. My preference would be to have a battery pack that is simply strapped to the frame, or better yet, to have an all-in-one unit. I think there are some of those that actually charge on a USB connection so you can charge it on any computer.



I've been commuting with it for about a year, no complaints. I recently got a wheelset that has a front hub dynamo, so I'm in the process of upgrading to a dynamo light set, but not because of any problems with the CygoLite (other than the hassle of recharging).