4 Inch Flush Mount Marine LED Spreader Light - Pro Series 3.0 | Scene (40W)

4 Inch Flush Mount Marine LED Spreader Light - Pro Series 3.0 | Scene (40W)

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Product Features Product Features

Powerful, Built-In Scene Lighting for Your Deck & Cockpit

 

Illuminate your boat with a clean, factory-style finish using the Black Oak Pro Series 4″ Flush Mount Marine Spreader Light – Scene. Designed to sit seamlessly into hardtops, transoms, and other flat mounting surfaces, this compact, high-output fixture delivers a wide 120° scene beam that fills decks, cockpits, and work areas with smooth, even light. It’s ideal for night fishing, docking, and general marine visibility — all without bulky external brackets.

 

Engineered for life on the water, this flush mount spreader features rugged marine-grade construction built to withstand salt spray, moisture, vibration, and harsh washdowns. Despite its low-profile design, it produces a powerful 3,120-lumen output using premium LEDs and precision optics for expansive coverage without harsh hotspots. Whether installed as a standalone light or paired with additional fixtures, it delivers reliable, built-in illumination you can trust after dark.

 

Features
  • Lifetime Warranty
  • IP69K Rated Housing – sealed against salt, spray, humidity, and washdowns
  • Wide 120° Scene Beam – smooth, even deck and cockpit illumination
  • Premium CREE LED Chips – maximum efficiency and long-term reliability
  • 316 Stainless Steel Mounting Bracket – corrosion-resistant for harsh marine environments
  • Ceramic-Coated Finish – superior UV and saltwater corrosion protection
  • Military-Grade Breather – prevents internal moisture build-up and pressure imbalance
  • Premium Lexan Lens – impact-resistant and will not fade or yellow over time
  • Low Amp Draw – efficient output without overloading your electrical system
  • Adjustable Bracket Design – fine-tune the angle for optimal spread and coverage

In the Box
  • (1) 4" Spreader Light
  • Pigtail Deutsch Connector - For easy wiring
  • Stainless Mounting Bracket and Hardware

 



Wide Scene Coverage

Engineered with a 120° scene beam, this light delivers smooth, even illumination across your entire work area — no harsh hotspots, just usable light where you need it most.

 

Seamless Flush Mount Design

Designed for a clean, built-in appearance, this flush mount light integrates directly into hardtops, transoms, and other flat surfaces for a sleek, factory-style finish. Its compact footprint allows it to fit into tight mounting areas without sacrificing output, delivering powerful, wide-area illumination while maintaining a streamlined look.


 

Simple, Secure Installation

Includes mounting hardware and a Deutsch-style connector for fast, reliable installation so you can get up and running with minimal effort.


Built for the Marine Environment. Backed for Life.

The Black Oak 4″ Marine Spreader Light is engineered to thrive in harsh sun, salt spray, and demanding offshore conditions. Featuring a rugged, fully sealed housing and premium components, it delivers reliable wide-area illumination night after night — all backed by Black Oak’s Limited Lifetime Warranty. When you need lighting you can trust on the water, this spreader is built to perform for the long haul.


Power & Performance
Total Wattage 40
Total Amp Draw 2.8
Operating Voltage 10 - 30V DC
Raw Lumens 3,120
Color Temperature 6,000
LED Diode Qty 4
LED Chip Cree
Beam Pattern Scene
Beam Angle 120°
Mode On/Off
Dimmable? Yes! (Separate dimmer module Required, NOT included)
Durability & Lifespan
Life Expectancy 50,000 Hours
Operating Temp -40° to 145° F
-40° to 62° C
Waterproof Rating IP69K
Warranty Limited Lifetime
Guarantee 30 Day Money Back
Wiring & Installation
Cord Lead From Light 16"
Wire Harness Included? No
Wire Harness Length N/A
Wire Gauge 16 AWG
Fuse Size 5 Amp
Connector Type 2 Pin Deutsch
Mounting Bolt Size 5/16"
General
Weight .35 Lbs
SKU 4FMSL


Frequently Asked Questions:

 

Q: What is the 4” Bracket Mount Marine Spreader Light designed for?
A: This light is built to provide wide, even scene lighting for decks, cockpits, towers, and work areas. It’s ideal for night fishing, docking, cleaning, and improving overall on-board visibility after dark.

 

Q: What beam pattern does this spreader light use?
A: The 4” Marine Spreader Light uses a wide scene beam pattern (approximately 120°) designed to evenly illuminate the area around your boat without harsh hotspots. It’s intended for area lighting, not long-distance projection.

 

Q: Is this light safe for saltwater environments?
A: Yes. This light is engineered specifically for marine applications and built to withstand salt spray, humidity, washdowns, and vibration. Its corrosion-resistant housing and sealed construction make it suitable for both freshwater and saltwater use.

 

Q: Where can this light be mounted?
A: The adjustable bracket mount allows for flexible installation on T-tops, towers, hardtops, radar arches, transoms, and work boats. The bracket design makes it easy to fine-tune the angle for optimal coverage.

 

Q: What voltage system is it compatible with?
A: The light operates on anything from 10-30V DC systems and integrates easily with most boat wiring setups.

 

Q: Is mounting hardware included?
A: Yes. The 4” Bracket Mount Marine Spreader Light includes mounting hardware for secure installation.

 

Q: Is this light covered under warranty?
A: Most of our marine lighting products are backed by our industry-leading warranty. Please refer to the warranty section on this page for complete coverage details.

Customer Reviews
5.0 Based on 16 Reviews
5 ★
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Filter Reviews:
RC
01/27/2025
Ruben C.
United States United States

Awesome Amount of Light

These things are crazy bright. Light up the back of my boat perfectly. I can see everything I to when it comes to baiting, cleaning fish, docking, ect..

BLACK OAK LED 4 Inch Marine Flush Mount Spreader Light - Black Oak LED Pro Series 3.0 Review
EL
12/07/2023
Ed L.
United States United States

Super Bright

These are the brightest spreader lights I've ever seen.

BLACK OAK LED 4 Inch Marine Flush Mount Spreader Light - Black Oak LED Pro Series 3.0 ReviewBLACK OAK LED 4 Inch Marine Flush Mount Spreader Light - Black Oak LED Pro Series 3.0 Review
A BLACK OAK LED Customer
JS
09/25/2023
Jim S.
United States United States

Nice lights

Very bright and seem very well made. Forward light bar and rear spreaders. Light bar is great for maneuvering around unfamiliar marinas etc. Rear spreaders really light up the cockpit, as well as the slip at night when backing in.

BLACK OAK LED 4 Inch Marine Flush Mount Spreader Light - Black Oak LED Pro Series 3.0 Review
MB
09/07/2023
Matt B.
United States United States

Great coverage!

Love these lights. Clean looking and super bright.

BLACK OAK LED 4 Inch Marine Flush Mount Spreader Light - Black Oak LED Pro Series 3.0 Review
RM
05/31/2023
Roger M.
United States United States

Clearly the Brightest

All I can say is light up my world. These lights are fantastic on my restored 1987 Defender 90. I took it out today to Gettysburg, PA, for its first road trip since completing the restoration, and I got as many compliments on the lights as I did on the car. Amazed by so many people asking me about your product and we tested the light bar against the other brands clearly the brightest ones today. Thanks for making such a great product and I look forward to the next project with Black Oak. The night vision camera is definitely on the Christmas list this year.

BLACK OAK LED 4 Inch Marine Flush Mount Spreader Light - Black Oak LED Pro Series 3.0 Review