Some lights claim they max out at 900 lumens, but you can use a light sensor to make sure for yourself.

It seems like I have been slightly obsessed with flashlights for quite some time. Perhaps it started when the Clover lights became popular in the '80s. It was that mini Maglite that ran on 2 AA batteries that I really liked. It was small enough that you could carry around and bright enough that it could actually be useful. When I was a bit older, I would even build and modify my own flashlights. One of my favorites was an underwater light I used for cave diving. It ran on a large lead-acid battery and powered a 25 Watt projector bulb. That thing was great (but not super portable).