Much brighter than I anticipated - I have only been using it on the low setting with no problems traveling 25-30 mph on unlit residential city roads. Haven't run out of juice yet, but it worries me especially with the USB charging as the only power option. The yellow side lights were brighter than I thought but I think it kinda gives a cool glow on your hands while you ride. Personally, I would prefer it if the handlebar attachment stayed put and the light would detach from it - but it's easy on/easy off so not too big of a deal. I just get nervous when I am repeatedly stretching rubber straps, especially after time and elements have done some work on it.