Review on BlueFire Professional Flashlight Submarine Underwater by Eric Chapman

This flashlight is definitely waterproof. That was enough for me for a 2.5 hour dive with no leaks. The light was just as bright as it started, so I'd say the battery life is excellent. However, the light emitted is not brighter than my 1000 lumen flashlight, but twice as strong. It's very big, heavy, it uses 2 batteries instead of 1. The charger never goes green either. It's always red, I left it on overnight on the second charge and it still didn't turn green.