very bright and good light. like that it can be used as battery bank, saved me a lot of time on the road when my cellphone is dying.
the only improvement it could have, is to make the on/off switch easier to use. right now you have to press kinda hard to turn it on. and you have to hold the button, while pressing hard , for a few seconds to turn it off. Sometimes when you are riding you really wanna be able to do it quickly so you can focus on the ride.