I gotta say I never came acrosss these flash lights until a dive guest on a liveaboard gave me one, and it's become a standard part of my dive kit ever since. I don't dive with it... It's for before and after the dive when setting up and packing down!
SureFire has affirmed that all current SureFire lights should be waterproof to about 33 feet/10 meters but they are by no means dive lights. Some reviews were posted before SureFire made the affirmation that their lights were watertight to 1 atmosphere depth. Any new Surefire lights you purchase now should be considered waterproof to 33 feet/10 meters.
SureFire Flashlights are powerful, compact, rugged and reliable. They produce optimal beams - no dark holes, rings, hot spots, or shadows. When you own a SureFire flashlight, you own the best.
SureFire 's advanced technology delivers illumination tools of superior design, materials, ruggedness, reliability, light output, beam quality, and ergonomics. The hardest test of equipment is combat and street duty, and the highest stamp of approval for Sure Fire Weaponlights is their widespread use by personnel operating in harm's way.
Surefire Special Operations Flashlights were developed for law enforcement and military applications where intensely bright light is used to startle, disorient, and control anyone on the receiving end, and where hard use in tough environments is expected.
Featuring optically coated and tempered Pyrex lenses and Mil-Spec Type III hard-anodized finishes, these law enforcement flashlights also have an internal shock isolation system to cushion the lamp assembly against impact, plus double O-ring seals for redundant moisture protection. These SureFire flashlights are tough enough to survive the rigors of combat and bright enough to reach far into the night.
Sure Fire Special Operations Flash Lights are also perfectly suited to extreme outdoors activities and environments. If you're going someplace where you might encounter yawning crevasses, dangerous drop-offs, irritated animals, or swift water - or all of the above - consider taking along a Surefire Special Operations Light.