The TCM-550XL Compact Weapon-Mounted Light uses a super-bright LED rated at 550 lumens working in conjunction with a precision-engineered total internal reflection (TIR) lens to create a bright white beam of light rated at 136 meters. This weapon light features completely ambidextrous and intuitive rear-facing toggle switches on each side of the light to operate the momentary-on and constant-on lighting modes.Features :LED technologyAmbidextrous rear-facing toggle switchesMomentary or constant-on flashlightAircraft-grade 6061-T6 aluminum housingType III hard anodized finishSharp, focused beam rated at 136 metersWaterproof