Bingo. While the ANSI FL1 was a step in the right direction to help standardize flashlight specs, they are not perfect. IMO, the Runtime Chart is more valuable in helping one determine the true performance of a light. SureFire claimed 400lms for their M3LT (last SF light I tested) and they are generally respected for being honest about their claims but just look at that runtime chart: https://budgetlightforum.com/t/-/6566
Sure it's 400lms but not for a meaningful amount of time.
I feel that all mfg's should start publishing runtime charts for their lights. This would leave no doubt as to the true performance above and beyond the published specs.