I'm looking to buy a quality flashlight. I will mainly use it for fishing, and a lot of the time it will be used in saltwater. It needs to be rugged since it will be knocked around a lot. Something around 4 or 5 inches would be cool, and I have to be able to attach it to a lanyard. If they make holsters that are comfortable and that can withstand the saltwater I'm open to that as well. Any help would be greatly appreciated.