The XT12S is a mid-size duty/utility type flashlight with magnetic charging and dual tail switches using a single 18650 battery. It offers shortcuts from off to high and low (or strobe). Its output falls well short of the advertised 1600 lumens, some modes have visible flickering and audible noise, and my sample was not waterproof. The concept isn't bad, but the execution could use some work.

The Klarus XT2CR is a pocket friendly 18650 light with USB charging and dual tailswitches offering shortcuts to useful modes or strobe. It is hampered by output falling well short of advertised, visible flickering, poor thermal regulation and cool white tint.

The Klarus G30 is a light for extended use. Its 900 lumen mode lasts 3.5 hours with no change in brightness over time. It's predictable, reliable, and better for getting work done than showing off. I don't care for the user interface with long-press for off and a high chance of accidental strobe, but this is a light meant to be turned on and left on for a long time, making the UI less of a concern than on an EDC light.