Hella Marine 5637 Replacement Light Bulb, 24V 10W, BA15s Base

Overview

The Hella Marine 178560241 is an incandescent replacement bulb rated 24V and 10W with a BA15s single-contact bayonet base, commonly used in navigation and interior light fixtures.

It is a straightforward swap when your fitting calls for a 24-volt BA15s bulb. It is also commonly referenced as a 5637 or R10W style bulb, which can help when matching an existing spare.

Because this is a filament bulb, it runs warm in use. Keep the lens and housing in good shape and stick with the specified wattage so the fixture does not overheat.

Key features

• 24V, 10W rating for 24-volt lighting circuits
• BA15s single-contact bayonet base
• Incandescent light source for fixtures that are set up for standard filament bulbs
• Common cross-reference: 5637 / R10W style bulb
• Useful for keeping existing navigation and interior fixtures running without changing the light

Compatibility and fit

Confirm the socket type in your fixture before ordering. BA15s is a 15 mm bayonet base with a single contact on the bottom. If your light takes BAY15d or a wedge base, this bulb will not seat correctly.

This bulb is for 24V systems only. On boats with both 12V and 24V circuits, check the supply at the light or on the fixture label to avoid an early failure.

Installation and setup

Switch off the circuit at the panel and let the bulb cool. Remove the lens or cover, press and twist the old bulb to release it, then push in and twist the new bulb until it locks.

Handling the glass with a clean cloth helps keep oils off the surface, which is especially helpful in enclosed navigation light housings where heat builds up.

Use cases on board

This bulb is a good match for skippers running 24V lighting on workboats, commercial vessels, and larger cruisers that still use incandescent navigation or cabin fixtures. Keeping a couple of spares on board can make a quick dockside fix instead of a late-night parts run.

Maintenance and care

After replacement, check the gasket and lens for cracks, then test the light with the cover secured. If the socket shows corrosion, clean the contacts and address any moisture entry so the new bulb is not exposed to the same problem.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

Learn more.

Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

Learn more.

Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

Learn more.