I'm very happy with the Serfas UTL-6 Thunderbolt. It's my favorite of all lights, front or rear.
The side of one of the bands broke in a mishap a while back, but everything still stays in place nicely. I like strapping it to the left seat stay - easy on and off - and usually set it to flash at low intensity for maximum life on a charge. I also like the fact that it doesn't so much
flash as blink softly.
