I really like the Olight products, I've got 4, from a headlamp for night Run n Gun matches to 2 pistol/rifle lights, and finally this, the M3XS-UT Javelot weapon light, shooting a white target at 600 yds and a Black target at 407 yds, in the dark.
Video is crap - I had to use an old camera with digital zoom to even see the targets with a camera. But here it is.
600 yds at dusk
400 & 600 yds at dark