The Nightstick TCM550XL is a compact, tactical weapon-mounted light. This high-performance device uses a powerful LED that emits 550 lumens. The LED works in tandem with a meticulously designed total internal reflection (TIR) lens. This combination results in a radiant, white beam of light with a maximum reach of 136 meters.The highlight of the TCM-550XL is its user-friendly design. It features rear-facing toggle switches on either side of the light. These switches are completely ambidextrous, making the light accessible and convenient to operate for everyone. Switching between the momentary-on and constant-on lighting modes is thus made remarkably simple and intuitive.