I used to have the light that dim posted in #53 for quite a while. One day it suddenly shut off during the ride. It didn't break, just the charge was running out. After recharging, it's on again, but I didn't want to risk it shutting off without warning. It didn't go dimmer and dimmer first, just went from normal bright to completely off. The light itself was great, and very lightweight. Now I just use super bright flashlight that runs on 18650s, so that I can replace the batteries easily. By the way, wonder if anyone want to try this for 88 bucks: (let us know how bright it is if you do )