Protect your boat from damage while docking at night30,000 cp bulb illuminates below the deckline. Newly-designed housing is fully sealed. Water cannot enter hull through docking light. Old-style O-Ring no longer needed to seal hull. Align and change eyeball from exterior of the hull. Just loosen set screw to align or change eyeball. Eliminates the need for access to the rear of the installed docking light. New eyeball will fit into old-style docking light housing. New-style housing will fit existing cut-out with only slight modification. Mil-Spec sealed waterproof/dustproof rocker switch panel included. 12 volt. White.Intended for Docking Only, Not for Continuous Use.