Peters & Bey Type 580 navigation lights are suitable for vessels <50m. Visibility 2nm. (H) 54mm x 64mm Ø. Windex NOT included, these lights come with a windex fitting located at the top of the navigation light. Black or Silver housing, made from anodised aluminium. Both shock resistant and non-corrosive. Certified Lifetime 20'000 hours, Maintenance Free. That's 7 years, 8 hours a day, 365 Day a Year. Compared to 800 to 1000 hours. (about 3 months) for a conventional light under continuous environmental conditions. LED's are not affected by temperature variation. 9-28V, IP67/68 Rated. Provided with mounting plate. Low power consumption with 1.5m cable. Solar panel power systems available. Colregs 1972 IMCO72 Approvals CE - BHS - GL(Lloyd) - UL1104 IMPORTANT: If using a custom mounting system made of stainless steel, a gasket or nylon / plastic separation washer must be used to prevent dissimilar metal reaction which may result in light failure.