Hella Marine MST3 Slim Strobe Lighthead, Red Light, 12-24V, IP67

Overview

The Hella Marine 358117121 is an MST3 Slim LED strobe lighthead that runs on 10-30 V DC and draws 3 W, making it a straightforward fit for both 12 V and 24 V onboard power.

It is a low-profile surface-mount warning light that uses three LEDs and supports multiple flash patterns, so you can set the signal behavior you want for a single light or a multi-light setup.

This is a good match for commercial and utility-focused boats that need a compact red warning signal on deck, on a hardtop, or along the hull sides where space is tight. Any rules around colored warning strobes vary by region and application, so placement and use should follow local requirements for your vessel.

Key features

• 10-30 V DC input supports 12 V and 24 V electrical systems
• Red MST3 Slim strobe lighthead with three LED emitters
• 12 user-selectable flash patterns, including a steady-on option, with memory recall at power-up
• Multiple units can be wired to flash in sync or in an alternating pattern
• IP67 protection for exterior mounting where spray, washdowns, and rain are expected
• Reverse polarity protection helps prevent damage from accidental wiring mistakes
• Weatherproof build that tolerates vibration on working boats and trailered setups

Installation and wiring

The lighthead mounts on a flat surface with a low profile, so it works well on tight mounting zones like transom corners, pilothouse sides, hardtop faces, and work decks. Plan your wire routing before final placement, since clean cable runs matter as much as the light location on a boat.

For best long-term results in saltwater environments, bring the wiring into a dry area or a protected chase, use tinned marine-grade conductors, and seal splices with adhesive-lined heat-shrink. Keep a little slack for service, add strain relief where the cable passes through panels, and protect the circuit with an appropriately sized fuse or breaker for the load.

Electrical and system integration

This lighthead is built for DC systems and is commonly integrated through a helm switch panel, an accessory relay, or a dedicated warning-light controller. If you are running multiple lightheads, route the wiring so they can be synchronized cleanly and so all units share a solid ground path to avoid intermittent operation.

Maintenance and care

Rinse salt residue off the lens and housing during routine washdowns, and check the wire exit point and connectors a couple of times per season. If you notice flicker or missed flashes, inspect grounding and any splices first, since most issues on boats come from corrosion or vibration at connections.

What’s included

• MST3 Slim strobe LED lighthead
• Mounting screws
• 3M mounting tape

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.

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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.

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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.

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