C4 LED illumination output and runtime:
High: 1,000 lumens; 115,000 candela peak beam intensity; 678 meter beam distance; runs 3 hours Medium: 550 lumens; 60,000 candela peak beam intensity; 490 meter beam distance; runs 6 hours Low: 35 lumens; 10,000 candela peak beam intensity; 200 meter beam distance; runs 80 hours