Streamlight®, I'll tell you a story, I am a Navy Rescue Swimmer onboard a forward deployed ship. Recently on a patrol we ran through a fishing net, a big one! We spent hours trying to get it onboard and untangled from the props and shafts. I ended up having to get in the water to try and cut the net free. It was dark at the time and I was using a standard shipboard battle lantern which is to say a piece of shit to try and look under the ship to see the extent of the entanglement. I had an idea and yelled to one of the guys on deck to go to my rack and grab my flashlight, a Scorpion® Streamlight. He found it and lowered it to me on a piece of rope. I turned it on and swam underwater, that thing was bright as hell!
It was not designed to be an underwater light but that's where I used it. For about 2 hours I had the light submerged in salty 60-degree water in the worst conditions, rain, rough seas. The light got beat around quite a bit. I used that light and was able to see all 4 props and shafts and could easily see the extent of the entanglement. 3 out of the 4 props and shafts where fouled by the massive net. Because of the Streamlight® I was able to identify that #1 prop and shaft was clear. We then where able to limp back to port on #1. Had it not been for that light who knows how long we would have been dead in the water out there. Streamlight® is where it's at!