The Wurkkos TS10 is a very small, almost keychain sized, Anduril 2 flashlight that has the brains to back up its 1400 lumen brawn.
1lumen.com
L3 approx 50L holds for about 6hrs. L4 holds just about 100L for 2hrs. Not bad levels & times for just a 14500 light. Most of the levels above 4 drop to level 4 output in around 30secs, mostly from the heat. A light this small just doesn't have the mass needed for cooling. I have one & use it a lot on the lower levels around the house. It is really easy to keep handy. I've seldom run the light for more than a minute or 2 at a time.