Hydro Glow Fishing Lights is the world’s leader in high quality underwater fishing lights. These fishing lights are 12vdc, high output LED, virtually unbreakable and made to last. Simply lower the light off the side of the boat. When it submerges to the desired depth, just tie or clip the cord on a rail or cleat. Bait fish will be attracted by the underwater lights. Predator fish will usually be deep under the light and a short distance away feeding on the baitfish around the perimeter of the underwater light’s glow.