Help separating truth from lies

I need a flash light for my offshore fishing boat. My boat is only 28' long and stowage is a serious issue.

I need a BRIGHT flash light... if someone falls overboard at night... I need to be able to search for them. I need to be able to signal at night in an emergency.

I've looked at the 100,000 lumen flash lights and I just don't believe it for the price. My problem is that once I establish that I don't know what to believe... well, I don't know what to believe.

I need a water proof flashlight. Rechargable. BRIGHT. Prefer the ability to have both focused beam and broad area. I prefer flashlight style as opposed to spot light with a handle. Needs to be battery powered, not plug in. Must be "amenable" to salt water environment.

Thoughts? Help appreciated