Attwood Marine LightArmor HP Series Underwater LED Light, 4 in, 800 lm, Surface Mount, 3 LED, SS316 Cover

Overview

The Attwood Marine LightArmor High Performance (HP) 4.0 is a 4 inch, 3 LED surface-mount underwater light for 12V and 24V DC boat systems. It is made for below-waterline installation and is available in Sapphire Blue, Tactical Green, and Intense White, with each color rated at 800 fixture lumens.

This compact LightArmor model works well on transoms, lower hull areas, and stern lighting layouts where a low outside profile matters. The 4.0 HP housing measures 4.00" long by 2.15" wide, with a .56" installed height, so it can add underwater lighting without the bulk of a larger fixture.

The light uses fully sealed waterproof electronics, reverse polarity protection, a heat sink cooling system with active overheat protection, and a lens made to resist impact. It is also resistant to corrosion, chemicals, and UV damage, which matters on boats exposed to saltwater, washdowns, sunlight, and vibration.

Key features

• 4.0 HP format with 4.00" length, 2.15" width, 3 LED layout, and .56" installed height for a low-profile underwater installation.
• 800 fixture lumens across the Sapphire Blue, Tactical Green, and Intense White color options.
• Compatible with 12V and 24V DC systems, with current draw varying by selected color.
• Heat-Sync cooling system with active overheat protection for submerged operation.
• Fully sealed waterproof electronics and reverse polarity protection for a cleaner installation process.
• Lens resists impact, while the housing is resistant to corrosion, chemicals, and UV damage.
• Aftermarket packaged part includes an electro-polished 316 stainless steel cover.
• 3 ft sheathed wire and minimal mounting hardware requirements help simplify routing and installation.
• CE certified for marine electrical use.

Variants

This LightArmor HP 4.0 underwater light is offered in three color configurations. Each version uses the same 4 inch, 3 LED surface-mount format and the same 800 fixture-lumen rating.

The main differences are the LED color and current draw. The dimensions, 12V and 24V DC compatibility, sealed electronics, reverse polarity protection, low-profile body, and 316 stainless steel cover in aftermarket packaging remain consistent across these variants.

• 65UW03B-7: Sapphire Blue. This option gives a blue underwater accent around the transom or lower hull, with 0.32 A draw at 13.6V and 0.16 A at 24V.
• 65UW03G-7: Tactical Green. This option gives a green underwater glow that suits fishing setups and night use around the stern, with 0.36 A draw at 13.6V and 0.18 A at 24V.
• 65UW03W-7: Intense White. This option gives a white light appearance for general underwater visibility, with 0.64 A draw at 13.6V and 0.32 A at 24V.

Installation and fit

This is a surface-mount underwater light, so it suits transom and hull locations where a low outside profile is preferred. The 4.0 HP model has 3.25" between mounting holes, a .56" wiring hole, .56" installed product height, and .30" wire collar depth.

All LightArmor underwater lights must be mounted below the waterline and operate only underwater. Plan the cable route and sealing points before drilling, and confirm that the mounting area is flat enough for the light body and cover to sit cleanly.

Electrical and operation

The light accepts both 12V and 24V DC boat power, which makes it useful on small center consoles, trailer boats, cruisers, and larger vessels with 24V banks. Current draw depends on the selected color, so the branch circuit, fuse, and switch capacity should be sized for the chosen variant and for the total number of lights on the circuit.

Reverse polarity protection helps protect the electronics during installation. The active overheat protection and heat sink cooling system matter because this unit is intended to run submerged, where the water around the body helps manage heat.

Use on board

The compact 3 LED format is a practical fit for transoms, swim platforms, lower hull accents, and small to medium boats where the owner wants underwater light without a large fixture. The color options cover accent lighting, fishing visibility, and clean white output for checking water around the stern at night.

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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