Well, the hard hat light runs off of my cranking battery. I have trolling motor batter up front, so I use that to run the other 3. I always charge up the front battery when I get back home,so Im not exactly sure how long it will run them till battery is dead. It is always plenty enough to get to the blind though. I also have a strand of 12v. rope lighting all the way around the inside of the boat. Makes it nice when your throwing out decoys. Illuminates the whole inside of the boat without blinding you.
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