Originally Posted by
gregf83
edit: just saw your post. I only use my lights when it's dark and I think they're more effective blinking. 2 hours would work for my daily commute if I wanted to leave it on steadily. That's not much different than my front light which I usually charge every day and it has a large (4.6 Ah) battery.
I use my rear light the same way. Keep in mind that his question is about group riding, where you generally can't set it to blink, or you'll be blinding the guy behind you. How about setting it to blink and pointing it toward the ground?
OP, If you've got to run it steady for longer than two hours, get a bigger light. The Rapid X will do- not only does it last longer on low steady, the pulse 'flash' isn't as bad on the eyes as the strobe style flashes most lights are programmed for. The Volt 50 is cool too, you can replace the battery on it in just a few seconds- buy extras , keep them in your pockets, ride at night forever.