These exceptionally durable and powerful lights offer multiple lighting modes from a variety of power sources. There's no task that these lights can't handle! The Twin-Task lights are the only machined aluminum flashlights with a patented xenon/LED combination for unmatched brightness and exceptionally long run times. Users can easily select the best light source and intensity for the task at hand. The Twin-Task lights also have an adjustable focus and a micro-faceted reflector for a smooth, perfectly focused beam. Includes an ultraviolet light for fluorescent detection of fraudulent documents and for use in forensic investigations. Powered by 3 "C" alkaline batteries 3.6 volt high-pressure xenon bulb; plus 6 ultraviolet 100,000-hour life LEDs 57 lumens typical with xenon bulb Titanium model features (6) 390 NM LEDs Up to 5 hrs. run time (xenon); up to 160 hrs. (3 LEDs); up to 100 hrs. (6 LEDs) 1.68" (D) x 9.02" (L) 1 lb.