The Dorcy Industrial Multi-function Headlamp features 280 lumens and 4 hours of run time on high. On low,the light offers 37 lumens with 14.75 hours of run time. Maximum beam distance is an impressive 103 meters. Industrial level construction ensures that the headlight is ready for the toughest work environments. Not just tough and powerful,this light is also comfortable to wear,even for hours at a time. An adjustable headband allows for a perfect fit.(41-2606)