All Round White Light/Anchor Navigation Lamp- Incandescent - 2nm - White Housing - 12VBSH approved, saltwater resistant and non-magnetic, they feature a bayonet lock on the lamp housing for easy bulb change.Designed for permanent installation or hoisting up masts.Specifications:. Material Description: UV and impact resistant plastic housing and lens. Minimum Visible Distance: 2 Nautical Mile. Bulb: 12V / 25W BAY15d included. Installation: Horizontal surface mount. Cable Entry: Through base plate with rubber grommet. Degree of Protection: IP 55. Approvals: IMO Col Reg 72, USCG, ABYC A-16, Maritime NZ