This system includes the Pelican PM6 3330 LED Flashlight and the innovative Universal Helmet Bracket, fits all models of industrial and fire helmets and as many as 27 other Pelican flashlights. Assembling in seconds with the help of a single flat-head screw driver, the Universal Helmet Light Bracket can be configured into an incredibly wide variety of angles and positions. Three styles of bracket attachment are included. Constructed of nearly-indestructible, engineering-grade, polymer, the PM6 weighs in at a scant 3.45 ounces so it won't weigh helmets down. Specifications: Light source - LED, tested lumen value - 41.0, tested lux value (@ 1 meter) - 9,000, batteries - 2 CR123 lithium (included), battery burn time - 40 hours, watts - 1, voltage - 6, length 5.27", weight w/ batteries - 5.04 oz, weight w/o batteries - 4.2 oz. (Available only in yellow)