I left a review below under Andrew. Want to add that hanging from bars the set screws attachment isn't sturdy enough for off road even with lock tight. Fell off and kept falling off. Easy fix is to drill and tap where the set screws would normally press so the screw goes all the way through. Hard to describe without a picture. Also adding a few loops of black gorilla tape on handle bars under the mount adds grip and adjustability.
Bright as F%$&@
Very bright. No flash function but I have a battery powered 300lume light for that.
Light doesn't really have a cut off so point it downwards enough to not blind people, it's very bright.
Install: I tapped into main power between battery and motor (at xt90) and used an xt60 plug between the tap wire and light so it's removable (bought from luna). It looks well waterproofed but I added liquid tape where wire exists and dielectric grease at the xt60.
Cons:It gets pretty hot and to mitigate that I hung under handle bars so I won't accidently touch it and it's a bit stealthy.
Would recommend. Very cool. Easy install.