Salt water is just deadly to most boat trailer lights — mine lasted about two seasons if I was lucky. In order to keep my trailer lights out of salt water, I devised a way to mount them in the rodholders of the boat. I used a 14-inch section of one-inch-diameter PVC, topped with a "T" joint. I drilled holes through the side of the "T" to match the threaded bolts on the back of each light. The wires come out of the base of each light, and run along the deck of the boat. I cut a slot in the bottom of each section of PVC to lock into the bottom of each rodholder.
— A. Zachry Everitt, Augusta, Georgia