Overview

The Lopolight 300-037 Series is a 5 NM white masthead navigation light with a 225 degree sector, made for vertical mounting on vessels from 20 to 50 m (65.6 to 164 ft). It runs on 20 to 32 VDC (typical 24V systems), draws 7 W (about 290 mA at 24 VDC), and is sealed to IP68 for washdowns and heavy weather.

The housing measures 107 x 92.5 x 74 mm (4.2 x 3.6 x 2.9 in) and weighs about 1.06 kg (37.39 oz). Light intensity is rated over 52 cd, and the operating temperature range is -25°C to 55°C (-13°F to 131°F).

Key features

• 5 NM masthead light with a 225 degree white sector for underway navigation lighting
• Electrical range: 20 to 32 VDC (suited to 24V onboard systems)
• IP68 sealing for exposure on masts, superstructures, and wet decks
• Anodized aluminum housing with a PMMA lens and A4 stainless steel fasteners
• Electronics potted inside the light for resistance to vibration and water ingress
• Rated over 52 cd light intensity; -25°C to 55°C operating temperature range
• Minimum feed wire gauge listed as 0.5 mm² (AWG 22)

Variants

This masthead light is offered in multiple finish options.

The finish changes the look of the housing while the core lighting function remains the same.

• 300-037: Finish Silver. A silver anodized housing that blends with bare aluminum spars and bright deck hardware.
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• 300-037B: Finish Black. A black anodized housing that matches dark-painted masts and darker exterior trim.

What’s included

• Navigation light with pre-attached cable
• Mounting hardware
• Installation guide

Installation and wiring

This is a vertical-mount masthead light, so it is typically fastened to a vertical face on the mast or a forward superstructure where the required arc of visibility is unobstructed. Plan the cable run before mounting, keep connectors out of standing water, and seal any fastener holes and pass-throughs appropriate to the mounting surface.

Power requirements are for 20 to 32 VDC systems. If your boat is 12V only, confirm you have the correct supply available before purchase and installation.

Compliance and use

This light is approved to COLREG72 and EN14744, and is also listed to IEC 60945 and USCG requirements. It is intended for applications where a 5 NM masthead light is specified for vessels in the 20 to 50 m range, as part of a complete and correctly positioned navigation light set.

Fit notes for buyers

This series is a good match for 24V yachts and larger vessels that need a 5 NM masthead light in a compact, vertical-mount form. It also suits refits where you want to keep the same mounting style and footprint while choosing a housing finish that matches the mast and exterior hardware.