Hella Marine MST6E LED Warning Lighthead, 12-24V, Green

Overview

The Hella Marine 358111731 is a green LED lighthead for 12V and 24V DC systems, commonly used as an auxiliary signal or marker light on boats. It runs on a multi-voltage 11-30 VDC input range, which makes it a straightforward fit on most modern DC electrical systems.

This style of lighthead is used when you want a focused, attention-grabbing indicator rather than general area lighting. It supports selectable operating patterns, including a steady mode, and can be set up so multiple lightheads flash together or alternate when installed as a set.

Because this is a lighthead, treat it as an add-on signaling component. If you are shopping for required navigation lights, confirm your vessel’s running-light compliance separately and use a dedicated, approved navigation light assembly for that role.

Key features

• Multi-voltage input (11-30 VDC) for use on 12V and 24V battery systems
• Green LED output for clear visual identification in low light and nighttime conditions
• Selectable operating patterns, including a steady setting, for different onboard signaling needs
• Multi-unit synchronization support when installing several heads on the same vessel
• Reverse polarity protection to help prevent damage from accidental wiring mistakes
• Housing built for exterior mounting where spray, washdowns, and vibration are part of normal boat life
• Aluminum base to help manage heat during extended operation
• Low-profile, surface-mount form factor that fits well on hardtops, cabin sides, arches, and transom structures

Installation and setup

Plan the mounting location the same way you would any exterior light on a boat: pick a flat, supported surface and leave room behind the panel for wiring bends, drip loops, and service access. On cored fiberglass, seal any penetrations properly so moisture cannot reach the core.

Wire it to a switched DC feed with appropriate circuit protection, and use marine-grade tinned copper wire with sealed connectors or adhesive-lined heat shrink. If you are installing multiple lightheads, keep runs tidy, label conductors, and route wiring away from sharp edges, steering linkages, and hot engine-room surfaces.

Use cases on board

This lighthead is a good match for commercial-style boats, tow rigs, and anglers who want an extra visual indicator for deck activity, dockside operations, or low-speed work situations where being noticed matters. It is also useful on larger vessels where a row of synchronized lights is easier to see from different angles around the boat.

Maintenance and care

Rinse salt residue off with fresh water as part of routine washdowns, especially if the light is mounted where spray dries on the lens. Periodically inspect the mounting fasteners and wiring terminations for loosening or corrosion, and re-seal any disturbed penetrations during seasonal maintenance.

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.