Marine Navigation Lights & Bulbs Catalog

Navigation lights are more than just compliance items—they are critical safety components that ensure vessels remain visible and identifiable at sea. Whether operating in coastal waters, rivers, or open oceans, properly installed and functioning navigation lights help prevent collisions, enhance communication between vessels, and meet strict international maritime regulations. At Diesel Pro Power, we proudly supply high-quality navigation lights, sockets, and bulbs to operators worldwide, trusted by over 40,000 satisfied customers in more than 180 countries.

This catalog covers navigation light bulbs, stern lights, sockets, and related marine electrical accessories designed to perform under the demanding conditions of marine service.

Importance of Marine Navigation Lights

Every vessel, regardless of size, is required by international maritime law to display navigation lights between sunset and sunrise, as well as in conditions of restricted visibility. These lights:

• Indicate the size and type of vessel.

• Communicate a vessel’s direction and movement.

• Help other operators assess right-of-way.

• Enhance visibility in busy waterways and harbors.

• Reduce the risk of collision, grounding, and onboard hazards.

Diesel Pro Power’s catalog includes durable navigation light systems designed to comply with the International Regulations for Preventing Collisions at Sea (COLREGs). Our products are built from corrosion-resistant materials, ensuring longevity even in saltwater environments.

Navigation Light Bulbs

Navigation light bulbs are essential replacement components that ensure the visibility and reliability of navigation lights. Choosing the right wattage, voltage, and socket type is critical for proper function.

Medium Prefocus Navigation Light Bulb – 120 Volts, 60 Watts

• Voltage: 120V

• Wattage: 60W

• Base Type: Medium prefocus

This navigation light bulb delivers a powerful beam, making it ideal for larger vessels or those requiring long-distance visibility. The medium prefocus base ensures a secure fit and optimal alignment in the socket, preventing light scatter and maintaining beam precision.

Marine operators often choose this bulb for stern lights, masthead lights, and deck illumination. Its 60-watt rating balances brightness with energy efficiency, ensuring compliance without excessive power draw.

Medium Prefocus Navigation Light Bulb – 120 Volts, 40 Watts

• Voltage: 120V

• Wattage: 40W

• Base Type: Medium prefocus

The 40-watt version provides slightly lower intensity while still maintaining compliance with maritime navigation requirements. This option is preferred by operators seeking reduced energy consumption or for use in secondary navigation fixtures where maximum brightness is not required.

Both the 40W and 60W bulbs are designed for durability, with filament construction optimized for vibration resistance—an important feature for marine applications where constant motion is unavoidable.

Stern Navigation Lights

Stern lights are mandatory on all vessels and must shine a white light visible across 135 degrees to the rear of the boat. They indicate the direction of travel to following vessels and are critical for nighttime operations.

White Stern Navigation Light for Boats (20m–50m)

• Application: Vessels from 20 meters (65.6 ft) to 50 meters (164 ft)

• Housing: Galvanized finish for corrosion resistance

• Color: White light

This stern light is engineered to meet the strict requirements for medium-sized vessels. Its galvanized housing protects against saltwater corrosion, extending service life and reducing maintenance.

Key benefits include:

• Compliance with COLREGs for vessels up to 50 meters.

• Bright, consistent white light for improved rear visibility.

• Durable marine-grade construction tested for vibration and weather resistance.

Commercial fishing vessels, workboats, ferries, and small cargo vessels often rely on this model for stern visibility. By using standardized bulbs like the prefocus 60W or 40W lamps, operators can easily replace components without rewiring or modifying the housing.

Navigation Light Sockets

Sockets are often overlooked but play a crucial role in maintaining secure electrical connections in harsh environments. A poorly seated bulb or corroded socket can cause intermittent failures, putting crew and vessel at risk.

Medium Prefocus Navigation Light Socket – Plastic

• Material: Heavy-duty marine-grade plastic

• Type: Medium prefocus socket

This socket is designed to pair with both the 40W and 60W prefocus bulbs. The plastic body provides resistance to corrosion, making it an excellent choice for vessels operating in saltwater conditions. Its secure fit ensures bulbs remain seated even under constant vibration and movement.

Benefits include:

• Lightweight, non-corrosive construction.

• Easy installation with standard wiring connections.

• Long service life with minimal maintenance.

Replacement sockets are essential for maintaining the integrity of older navigation light systems, ensuring ongoing compliance without requiring full fixture replacement.

Choosing the Right Navigation Light Components

Selecting the correct navigation light system involves considering:

• Vessel Size: Regulations differ for boats under 20m, between 20–50m, and over 50m.

• Voltage Compatibility: Marine electrical systems may operate on 12V, 24V, or 120V.

• Wattage Needs: Brighter bulbs (60W) are often needed for larger vessels, while 40W options are sufficient for smaller ones.

• Socket Type: Medium prefocus bases must match compatible sockets.

• Durability Requirements: Galvanized housings and vibration-resistant filaments are recommended for vessels exposed to heavy seas.

Diesel Pro Power Advantage

Choosing Diesel Pro Power for marine navigation lights means investing in quality and service backed by decades of expertise:

• 40,000+ satisfied customers worldwide.

• 24-hour global shipping to over 180 countries.

• Comprehensive inventory of marine electrical parts beyond navigation lights, including searchlights, bulbs, and full electrical systems.

• Expert support—our team verifies compatibility before shipping.

• User-friendly online catalog designed to save time and reduce errors.