The tip of Glacier line, the Glacier 320 Headlamp boasts 150 lumens of path-finding brilliance, and a 320 foot directional beam that will reveal upcoming curves in the single track or light the way for your lead sled-dog. Powered exclusively from Brunton Pharos power pack, the hours of run time can be supplemented with a solar power during the daylight on extended trips, and the power pack also doubles as an auxiliary power source for your USB electronics like smart phones and mp3 players.