You can set the brightness yourself at 3 levels plus it's got it's full boost mode which is basically OTT unless you're full speed descending. I've set mine to regular high, a bit under high (but still fine for most unlit stuff) and low for commuting. The battery life does 2 hours at that boost, under that it lasts ages switching between the other 2 high modes, you can also buy some more 18650s which are easy to swap out if you're planning really long night rides.
You can set the brightness yourself at 3 levels plus it's got it's full boost mode which is basically OTT unless you're full speed descending. I've set mine to regular high, a bit under high (but still fine for most unlit stuff) and low for commuting. The battery life does 2 hours at that boost, under that it lasts ages switching between the other 2 high modes, you can also buy some more 18650s which are easy to swap out if you're planning really long night rides.