The XT10 was a really great step for Klarus, a new brand that at the time was able to launch itself into the flashlight market with a great and incredibly reliable flashlight. Now, they have improved on the already impeccable light by introducing the Klarus XT11. Unlike the previous model, the XT11 has an upgraded XML-LED with the new U2, which boosts the lumen output up to an incredible 600 lumens. Another improvement can be found in the new integrative lens of the light, which can be swapped out for a blue, green, red, or frosted lens depending on the required color. Where great things were added to the XT11, Klarus also left the good qualities from the previous XT10 untouched, such as the dual switch on the tail cap and the edged tactical ring to prevent the light from rolling.