Overview

The Lopolight 301-011 Series is a 5nm, 225° white masthead navigation light range for vessels from 20 to 50 m (65.6 to 164 ft), built for horizontal mounting where the light has a clear view forward. It runs on 10 to 32 VDC and the housing is IP68 rated for spray and washdowns.

The body diameter is Ø92.5 mm. Depending on configuration, overall height is 74.5 mm for single stack units and 96.5 mm for double stack units, which helps when you are checking clearance on a mast cap, bracket, or hardtop mount.

These lights are approved to COLREG72 and EN14744 and meet IEC 60945 and IACS E10, with USCG recognition.

Key features

• White masthead sector: 225° with 5nm visibility
• Rated for vessels in the 20 to 50 m range
• 10 to 32 VDC input for 12 V and 24 V DC systems
• IP68 rated for exposed mast and arch locations
• Operating temperature range: -25°C to 55°C
• Ø92.5 mm body diameter across the range; 74.5 mm height (single stack) or 96.5 mm height (double stack)
• Plug connector connection for cleaner installs and easier servicing
• Construction materials include aluminum housing (silver or black anodized 25µ, or white ceramic coated), PMMA lens, and A4 stainless steel screws
• Minimum feed wire gauge: 0.5 mm2 (AWG22)

Variants

Finish and stack style are the two things that change across the 301-011 range.

Finish options include silver anodized, black anodized, and white ceramic coated. Style options include single stack and double stack. Single stack units measure Ø92.5 mm x 74.5 mm; double stack units measure Ø92.5 mm x 96.5 mm. Mount base details, cable exit, and power draw can differ by configuration and are tied to the specific variant.

Installation and setup

Mount the light level and aligned with the vessel centerline so the 225° sector points forward. Keep the lens clear of antennas, stays, and other hardware that could shadow the beam. A solid mounting surface matters at the masthead because vibration can work fasteners loose over time.

Seal any penetrations, route wiring where it will not chafe, and support the cable close to the entry point. If wiring runs outside the mast, a drip loop before the connector helps keep water from tracking into the connection area.

Electrical and system integration

Operating voltage is 10 to 32 VDC, which suits typical 12 V and 24 V DC banks. Use appropriate circuit protection for your navigation light circuit and size wiring to the run length, meeting the minimum 0.5 mm2 (AWG22) requirement or heavier as needed.

The plug connector makes it easier to disconnect the unit for rig work, mast service, or replacement without cutting conductors.

Materials and corrosion resistance

The housing is aluminum with either an anodized finish (silver or black) or a ceramic coated white finish, paired with a PMMA lens and A4 stainless steel screws. On aluminum masts and brackets, isolate dissimilar metals where possible and use a suitable anti-seize on fasteners to reduce corrosion and galling.

Use on board

This series fits yachts and workboats in the 20 to 50 m class that need a 5 nm masthead light for night running and reduced visibility. Double stack configurations provide a double masthead arrangement in a single mounting footprint for installations that call for two masthead lights in the same location.

Maintenance and care

Rinse salt off the lens and housing during washdowns and wipe with a soft cloth. During routine rig checks, inspect the mount for movement and confirm wiring support points are still secure, especially after offshore runs or heavy weather.