Viridian Taclight with RADIANCE For RUGER LC9 / LC9s / LC380. The Viridian REACTOR RTL lighting system with RADIANCE includes an ECR Instant-On custom fit holster with automatic taclight activation the moment you draw. No buttons no squeezing no doubt. Weighs Only .78 oz Instant-On When Drawn From Included Holster Choose From Constant Or Strobe Modes Taclight with Radiance Improves Viewing Area Low Battery Indicator - Full / Replace WEIGHT: .78 oz. (including batteries) Virtually weightless CONSTRUCTION: High strength thermomolded polymer BATTERY LIFE: Approximately 1 hour (depending on use) LIGHT OUTPUT: 100 lumens constant 140 lumens strobe CHARGE DISPLAY: 2-color battery level indicator ready / replace ACTIVATION: Automatic activation with ECR