Replacement lights you can change from the exterior of your hull.30,000cp bulb illuminates below the decklineMakes nighttime docking safe and easyHousing is fully sealed—water cannot enter hull through the docking lightAlign and change the eyeball from the exterior of the hull. Just loosen set screw to align or changeNew eyeball will fit into "old-style" docking light housingIncludes bulb and eyeball