Perko Double Contact Bayonet Bulb, 30W, Clear Type T-8, C-8 Filament

Overview

The Perko Double Contact Bayonet Bulb is a 30W clear Type T-8 replacement bulb for Perko figure 0374 marine lighting applications, offered in 12V, 24V, 32V, and 120V versions.

This incandescent bulb uses a C-8 filament with a 1-3/8 inch L.C.L. and is rated at 24 candela. It is a practical service part for keeping compatible navigation and fixture lighting operating as intended, especially when replacing a failed bulb rather than changing the whole light assembly.

Because the same bulb style is available in several voltages, the vessel’s lighting circuit voltage should be matched before installation. The bulb weighs 1 oz., which makes it easy to keep as a spare aboard for cruising, fishing, or dockside maintenance.

Key features

• Clear Type T-8 incandescent bulb for compatible Perko double-contact bayonet fixtures.
• 30W output with a 24 candela rating for marine lighting service.
• C-8 filament with 1-3/8 inch L.C.L. for the correct lamp geometry in matching fixtures.
• Available in 12V, 24V, 32V, and 120V versions to match different vessel electrical systems.
• Useful as an onboard spare for replacing a burned-out lamp without replacing the fixture.

Variants

This Perko bulb is offered in multiple voltage configurations so it can be matched to the circuit used on the vessel or fixture.

The bulb type, 30W wattage, clear Type T-8 form, C-8 filament, 1-3/8 inch L.C.L., 24 candela rating, and 1 oz. weight are consistent across the range. The voltage is the main difference between the listed variants.

• 0374004CLR: 120V. This version suits compatible 120V AC lighting circuits and should be used only where the fixture and supply voltage match.
• 0374001CLR: 12V. This version fits common 12V DC boat lighting systems used on many small and mid-size vessels.
• 0374002CLR: 24V. This version matches compatible 24V DC systems often found on larger boats or vessels with higher-voltage service circuits.
• 0374003CLR: 32V. This version is for compatible 32V systems, which are still found on some older or specialized marine installations.

Compatibility and fit

Confirm the fixture accepts a clear Type T-8 double-contact bayonet bulb and check the voltage stamped on the old bulb, fixture, or circuit before ordering. Using the wrong voltage can result in poor light output, premature failure, or damage to the lamp.

Use on board

This bulb is a good match for boat owners and service technicians maintaining existing Perko lighting rather than converting the fixture to a different lamp style. It is especially useful to keep aboard when a vessel relies on compatible incandescent navigation or fixture lighting during evening runs, overnight anchoring, or routine maintenance.

Shipping
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Processing and dispatch
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Delivery and tracking
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Duties, taxes, and support
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Warranty terms, coverage, and duration are set by each manufacturer. Issues involving defects, repairs, or replacements must be addressed with the manufacturer’s support team. When available, the warranty period is listed on the product page. If it is not shown, contact us or the manufacturer for details before purchasing.

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We are happy to help you find the right contact or documentation, but we cannot decide outcomes or intervene in claim resolutions. For guidance, email cs@qualityboatparts.com.