The Twin Task 3C UV flashlight features three lighting modes and the latest in LED technology. The six 390nm UV LEDs provide ultraviolet light for detection of fraudulent documents or detecting engine and HVAC leaks. The white LED with its textured reflector provides an even beam, along with piercing hotspot for distance. White LED with a 50,000 hour lifetime. Six 390nm UV LEDs with 100,000 hour lifetime. 3 modes: C4 LED – 185 lumens runs 27 hours, 6 UV LED – 44mW runs 63 hours, and 3 UV LED - 30mW runs 81 hours. Runs on three ''C'' size alkaline batteries. Push-button sequences through white LED, six 390nm UV LEDs, three 390nm UV LEDs, and off. IPX4 rated for water-resistant operation. All openings O-ring sealed. One meter impact resistance tested. Unbreakable polycarbonate lens and wrist lanyard.