The Black Diamond Storm is a powerful, waterproof headlamp for any adventure. Ideal for everyday adventures that require a versatile lighting solution. The Storm will pump out 350 lumens at maximum output to help you find a hut or the next belay, and dim right down to 4 lumens for reading a book in your tent or sorting gear. Black Diamond's PowerTap technology allows you to quickly jump between full brightness and your previous light setting. The Storm also features red, green and blue lighting modes to aid in preserving night vision. The headlamp is IP67 Waterproof and runs on 4*AAA bateries.