Forespar Performance Products Floating Strobe LED Water Light WL-1. Powerful LED strobe operates with spring post 6V lantern battery comes with bracket mount USCG approved.Built to meet Code of Federal Regulations sub part 161.010; this rugged LED water light produces brilliant strobe flashes automatically when thrown overboard and is visible for miles at sea. When used with a 6 volt alkaline lantern battery (not included) it will flash at the U.S.C.G. required rate for over 52 hours and will still flash at least every 2 seconds after 7 days of continuous operation (meets U.S.C.G. requirements 46 CFR-161-010). A stainless steel molding bracket is included. Dimensions are 11-1/2 long and 4 maximum diameter. Specifications for Forespar Performance Products WL-1 Floating Strobe LED Water Light: Manufacturer: Forespar Performance Products Color: Black Bulb Type: LED Package Contents: Forespar Performance Products WL-1 Floating Strobe LED Water Light Forespar Performance Products 205102: Floating Strobe LED Water Light WL-1