The default temperature limit is 50°C. So the Turbo, Temperature Limit = 50°C curve is essentially what you want. Since it stepped down and got stable at a brightness level near Mid1, we can conclude that under the same environment High would eventually step down to around Mid1, and Mid1 should keep about constant brightness until LVP (= about the same runtime/characteristic as the Mid1, Temperature Limit = 70°C, Cooled curve).
Anduril UI adapts the brightness in accordance with the environment/heat dissipation conditions promptly. That’s why I only showed you Turbo, Temperature Limit = 50°C and didn’t bother with more curves without cooling — if thermal step-down can occur, the results are only meaningful for the environment/conditions at that moment, and it may vary a lot when you use the light some day (say, the heat dissipation will be much better on cooler days, or if you hold the light with your bare hand).
So I adjusted the temperature limit (and applied cooling) when testing the High/Mid1/Mid2, to prevent the light from thermal step-down. The resulted curves are more meaningful and can give you an idea how long the light can last at each brightness level, the min runtime you may expect. However the performance of a li-ion cell may greatly degrade under low temperature environments and impact the runtime, but that’s a different story…