Overview

The Lopolight 400-401-B is a circular aluminum baseplate for Lopolight horizontal-mount navigation lights, finished in black. It measures 130 mm across and weighs about 11.99 oz (0.34 kg), so it adds a solid footprint without adding much weight up high.

This is a replacement baseplate meant for repairs and refits where the original baseplate is worn, damaged, or you want a clean mounting surface again. The light itself is not included.

Key features

• Circular 130 mm baseplate for Lopolight horizontal-mounted navigation lights
• Aluminum construction with a black finish for a tidy look on a cabin top, hardtop, or radar arch
• Can be used with Lopolight bases 400-034, 400-035, and 400-037
• No wiring or voltage considerations since it is a mechanical mounting accessory
• Lightweight at about 11.99 oz (0.34 kg) for easier handling during installation

Compatibility and fit

This baseplate is intended for Lopolight horizontal mounted lights. Before drilling or sealing anything, confirm you have enough flat surface area for a 130 mm base and that the mounting holes line up with your existing light base and cable routing.

Installation and setup

Installation is a straightforward swap: remove the light and old baseplate (if installed), clean the mounting surface, position the new baseplate, then fasten it down evenly. Any deck or hardtop penetrations should be sealed appropriately for your mounting location to keep water out of the core.

Materials and corrosion resistance

Aluminum hardware on a boat benefits from basic corrosion prevention, especially in saltwater. When mounting against stainless fasteners or dissimilar metals, simple isolation steps like suitable bedding and insulating washers help reduce galvanic staining over time.

What’s included

• Circular baseplate
• 3 x M6x14 mounting screws
• Instruction manual

Use cases on board

This baseplate makes sense for owners keeping spare parts aboard, yards doing navigation light replacements, and anyone reworking the mounting area for a horizontal light on a cabin top, hardtop, or arch where you want the light to sit flat and stay properly secured.