Marine Searchlight Bulbs and Sockets Catalog

Marine navigation and safety depend heavily on reliable lighting systems, and at the heart of those systems are specialized bulbs and sockets designed to withstand the demanding conditions of life at sea. From compact seal beam designs to high-intensity quartz halogen lamps, every bulb plays a role in keeping vessels visible, compliant, and safe. At Diesel Pro Power, we provide a complete catalog of marine searchlight bulbs and sockets trusted by more than 40,000 satisfied customers worldwide.

Our collection covers a wide range of voltages, wattages, and base types, ensuring operators of fishing boats, cargo ships, ferries, and offshore vessels can find exactly what they need for their Perko searchlights and navigation lights.

Importance of Marine Searchlight Bulbs

Searchlight bulbs are not just replacement items—they are mission-critical safety components. A failed searchlight in poor weather or at night can put a crew, cargo, and vessel at risk. Unlike ordinary household bulbs, marine bulbs are engineered to handle:

• Saltwater corrosion resistance

• Constant vibration from engine operation and rough seas

• High temperatures generated by long operating hours

• Electrical stability in variable marine power environments

Each bulb is carefully matched with its socket and reflector assembly to ensure optimal beam distance, brightness, and reliability.

Seal Beam Bulbs for Marine Searchlights

7-Inch Diameter Seal Beam, 12 Volt, 100 Watt

Seal beam bulbs are self-contained units with the filament, reflector, and lens fused together. This makes them exceptionally durable in marine environments where shock and vibration are constant.

The 7-inch, 12-volt, 100-watt version is commonly used on smaller vessels with DC electrical systems. Benefits include:

• Steady, bright illumination for night docking and near-shore navigation

• Long service life thanks to rugged sealed construction

• Ease of installation with no need to align separate reflector components

This type of bulb is a favorite among operators of pilot boats, harbor craft, and smaller yachts.

7-Inch Diameter Seal Beam, 24 Volt, 450 Watt

For larger vessels with 24-volt electrical systems, the 450-watt seal beam bulb delivers significantly more output. These bulbs are ideal for long-distance beam projection, such as when spotting buoys, monitoring shorelines, or illuminating wide work areas on deck.

Key features include:

• High-intensity output for extended visibility range

• Robust design able to withstand heavy vessel vibration

• Compatibility with standard Perko 7-inch housings

Incandescent Marine Searchlight Bulbs

120 Volt, 1000 Watt, Bayonet Base

This high-power incandescent bulb is designed for ships with AC electrical systems. The bayonet base ensures a secure, vibration-resistant connection, reducing the chance of flickering or electrical contact failure.

Applications include:

• Commercial shipping vessels operating at night

• Offshore platforms requiring constant deck illumination

• Large ferries needing reliable bow lighting

120 Volt, 1000 Watt, Screw Base

The screw base version provides the same output as the bayonet type but offers compatibility with threaded socket assemblies. Its versatility makes it a practical solution for vessels that may retrofit or interchange socket designs.

120 Volt, 750 Watt, Bayonet Base

Slightly lower in wattage, the 750-watt bayonet base bulb balances power consumption with effective light projection. This makes it a reliable choice for operators seeking to reduce generator load while maintaining strong illumination.

Quartz Halogen Marine Searchlight Bulbs

Quartz halogen bulbs deliver brighter light output with a more concentrated beam compared to standard incandescent options. They are favored by operators needing crisp, long-distance visibility.

120 Volt, 2000 Watt, Bayonet Base

One of the most powerful bulbs in the catalog, this 2000-watt halogen unit is used for extreme conditions such as ice navigation, offshore towing, or large-scale deck operations at night.

120 Volt, 600 Watt, 2-Pin Prefocus Base

Compact yet powerful, the 600-watt quartz halogen bulb is designed for mid-sized vessels. The 2-pin prefocus base ensures precise alignment, guaranteeing a focused beam without distortion.

120 Volt, 900 Watt, 2-Pin Prefocus Base

This option provides stronger illumination while maintaining the secure connection of a prefocus socket. Frequently used in coastal patrol and workboat applications.

120 Volt, 1000 Watt, 2-Pin Prefocus Base

With slightly more intensity, the 1000-watt 2-pin halogen bulb offers a strong balance between power draw and beam range. It is widely chosen for tankers, tugs, and utility craft.

Navigation Light Bulbs

120 Volt, 60 Watt, Medium Prefocus

Navigation lights serve a different purpose than searchlights, providing visibility to other vessels rather than illuminating surroundings. The medium prefocus 60-watt bulb is designed for consistency and reliability in navigation light fixtures, ensuring compliance with international maritime safety regulations.

Sockets for Marine Searchlight Bulbs

Bulbs are only as reliable as the sockets they connect to. Vibration, salt corrosion, and heat can all compromise a poor-quality socket. Perko sockets are built to ensure long-term performance.

Mogul Prefocus Socket, Bayonet Type

Designed for heavy-duty incandescent and halogen bulbs, the Mogul socket provides a stable base and strong electrical contact. Its bayonet design prevents accidental loosening during heavy vibration.

2-Pin Prefocus Socket

This socket is specifically engineered for quartz halogen bulbs requiring precise filament alignment. By locking the pins in exact position, the prefocus socket ensures the beam remains sharp and directed, maximizing visibility distance.

Choosing the Right Marine Searchlight Bulb

When selecting a replacement bulb, operators should consider:

• Electrical system voltage: 12V and 24V bulbs for DC systems, 120V bulbs for AC systems

• Wattage: Higher wattage produces more light but also draws more power

• Base type: Bayonet, screw, or 2-pin prefocus depending on the fixture

• Application: Navigation, docking, long-range spotting, or deck illumination

Choosing the right combination ensures safety, efficiency, and compliance with marine regulations.

Diesel Pro Power Advantage

Ordering from Diesel Pro Power ensures not only access to a complete catalog of marine searchlight bulbs and sockets but also industry-leading service and support.

• Global Reach: We ship to more than 180 countries.

• Trusted by Professionals: Over 40,000 satisfied customers worldwide.

• Fast Shipping: Most orders ship within 24 hours to minimize downtime.

• Expert Support: Our team confirms compatibility before shipping.

• Comprehensive Inventory: From Perko searchlight bulbs to navigation light sockets, we provide full catalog coverage.