Viridian Reactor RTL Tactical Pistol and Handgun Light, ECR Instant On Technology, Radiance Lighting RADIANCE TECHNOLOGY: This compact tac pistol light emits up to 140 Lumens of bright light with horizontal light dispersion to better view threats across a wider area. ECR INSTANT ON: Includes a sleek Instant-On ECR holster. When drawn, the radiance tac light is activated in the predefined mode set by the user. No fumbling with buttons in critical situations. When you draw, it's on! LIGHT MODES: Choose between 100 lumen constant light and 140 lumen strobe modes. BATTERY LIFE: 60 min in constant light mode or 120 min in strobe mode. Includes a dual color low battery indicator. CONSTRUCTION: Built specifically for the Ruger LCP from high strength thermo molded polymer, this tactical light is only .78 oz. including the battery. Virtually Weightless!