Lightweight, compact and low profile, the Streamlight VANTAGE has been designed to easily attach above or below full brim Fire and Industrial helmets. The light features the latest in power LED technology combined with an ultra-bright blue LED safety tail light. Powered by lithium batteries, the new C4 premium LED technology produces 2 to 3 times the output of previous LEDs. Sealed for water-resistance. Specifications: light source - C4 LED, light output - 4,500 peak candela, measured output - 80 lumens, battery - two (2) 3 volt CR123A lithium batteries, run time - 6 hours, length - 3.26", weight w/ batteries - 5.14 oz.