The new Elzetta Blog has been putting out some excellent content. The latest post throws back the curtain on what some flashlight makers do in order to offer best in class output and how it might compromise the performance of the light.
The adoption of FL1 standards has largely taken away some of the old tricks that flashlight makers used to play in order to inflate their lumen ratings but less reputable makers still have a few ways to try and dupe us. Given that all LED emitters work within a specification of X amount of power in equals X amount of lumens out, you should be suspicious of makers who are claiming that their LEDs boast greater output than competitors who use the same emitter. They are either being deceitful or they are pushing the LED beyond safe levels of current which can greatly compromise its reliability and longevity.