I found the light to be very good. I am using a dynamo system now with 4 Luxeon 3s but the trailtech was a good light and still is. I am thinking of using it for night mountain biking now. I just used a cheap seatbag from supergo and turned it upside down to mount it like the bento box on the top tuble and it worked good.
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Sunrise saturday,
I was biking the backroads,
lost in the moment.