Perko 1128 White Masthead Light, For 20-50 m Vessels, 5nm, 225 deg

Overview

The Perko 1128 is a white masthead navigation light for vessels 20 meters to 50 meters in length. It has a 225 degree visibility arc and carries a 5 mile USCG visibility rating, making it a fit for larger power-driven boats that need a compliant forward white running light.

This light uses a black or white polymer housing depending on the selected variant, with a white lens and a double contact bayonet socket. It is pre-wired with 3 feet of 16/3-SO cable, which helps simplify routing at the mast, pilothouse top, hardtop, or other approved mounting location.

The overall height is 7-1/2 inches, with a 4-1/4 inch lens height and 1/4 inch screw size. The bulb is not included, and the light is built for 12V, 24V, or 120V bulb options using the required Perko 0374 bulb family for proper compliance.

Key features

• White masthead navigation light with 225 degree visibility for the forward sector of the vessel.
• Certified for vessels from 20 meters to 50 meters in length.
• 5 mile USCG visibility rating for navigation use on larger boats.
• Accepts 12V, 24V, or 120V bulb options, with the bulb purchased separately.
• Pre-wired double contact bayonet socket with 3 feet of 16/3-SO cable.
• Watertight access cap supports bulb replacement and lens cleaning without removing the full light.
• Polymer housing available in black or white to match the mounting area and vessel trim.
• 7-1/2 inch overall height, 4-1/4 inch lens height, and 1/4 inch mounting screw size.

Variants

This masthead light is offered in two housing color configurations.

The functional layout remains the same across the variants, while the housing color changes to suit the look of the mounting surface and surrounding hardware.

• 1128A00BLK: Black housing. This finish suits dark mast sections, hardtops, pilothouse trims, and installations where the light housing should blend into black hardware.
• 1128A00WHT: White housing. This finish suits white gelcoat, white pilothouse structures, and deck areas where a lighter housing keeps the installation visually clean.

Installation and electrical fit

Mount this light where the white masthead sector has the required forward visibility and is not blocked by rails, antennas, canvas, outriggers, radar equipment, or deck structures. The 3 foot cable lead gives the installer enough length to route into the vessel structure before connecting to the navigation light circuit.

Match the bulb voltage to the vessel system and use the required Perko 0374 bulb type for compliance. For 12V systems, the rated bulb load is 30 watts at 2.5 amps. For 24V systems, the rated bulb load is 30 watts at 1.25 amps. For 120V systems, the rated bulb load is 30 watts at 0.25 amps.

Use on board

This light fits larger cruising boats, commercial vessels, sportfishing boats, and workboats that need a traditional serviceable masthead light rather than a sealed LED unit. The access cap is useful on boats where bulb changes and lens cleaning may need to be handled during routine maintenance without disturbing the mounting base.