Bright, reliable light - even in the worst conditions.  The Storm has 100 lumens of illumination to brighten whatever your doing, and the IPX7 rating means it's protected against water immersion down to 1 meter for 30 minutes.  Use the proximity, distance or strobe modes as well as the red LEDs to preserve your night vision.  There's even a lock mode to prevent accidental battery drain from the lamp getting turned on in your pack.

Specifications:

LED Type : 1 TriplePower, 4 SinglePower (2 white, 2 red)
Lumens : 100
Max Distances : 70 m (TriplePower LED); 25 m (2 SinglePower LEDs)
Max Burn Time : 50 H (TriplePower LED); 125 H (SinglePower LEDs)
Batteries : 4 AAA
Weight With Batteries : 110 g, 3.9 oz
IPX Rating : 7