Black Diamond Distance 1500 HeadlampDesigned for the overnight endurance pushes , the Distance 1500 is the pinnacle of headlamp technology boosting a max light of 1500 lumens and has enough capacity to last the entire night at a moderate setting. Product Features Constant output programming provides continuous light before dropping to reserve power mode One full battery lasts 8 hours at 300 lumens; two full batteries last 8 hours at 600 lumens Comfort Cradle provides contoured, bounce