Head-worn light Main body Illumination : 30,000 In (at 25cm working distanceJ/Astral : 50.000 Ix CofOf Temperature : 6,000 Kelvin Max LED operating life : 50,000 hours Focusing Light size : 20mrri > 50 mm (410F) Battery Module Headband size Operation time : 4 hours Type : Li-ion (built-in protected curcuil module) Charging time : 4 hours Battery pack