LED Underwater Boat Lights

LED Underwater Boat Lights

LED Underwater boat lights are an investment, not just in your boat, but in the memories you make with family and friends.

They’ll remember this.

The nights watching the fish play in the lights, the overnight fishing trips, the couples nights spent talking and laughing, the romantic evenings under the stars.

After all, you didn’t buy a boat for transportation. You bought it to make memories. And the more time you spend on your boat, the more memories you’ll make.

The problem is, the sun is only out for so many hours a day. And once it sets its time to pack things up and head back home.

But what if there was a way to get your family off the couch and back to doing the thing they love the most. Boating!

LED Underwater Boat Lights Give You More Time for Making Memories

  • Entertain Friends: They’ll be amazed at how beautiful the lights are and how many fish they attract.
  • Reconnect with Family: Fishing, game night, or stargazing. Your kids might even put down their phones!
  • Romantic Evenings: The moon and stars, soft music, a bottle of wine, and the glow of the lights. Forget the world. You’ve got each other and the perfect evening.

One Size Doesn’t Fit All

Since boats don’t come in just one size, Shadow-Caster designed the SCM series of underwater boat lights in three sizes.

scm-4 underwater boat lights


First, there’s the SCM-4 for small boats, 18′ and under. In reality, small boats with narrow beams don’t need as much light as a larger boat. The SCM-4 produces an amazing 1200 lumens of light in the Great White color.

Put a pair of SCM-4s on your transom, or even each side of your boat. They are perfect for crappie fishing, flats fishing, and flounder gigging.

Best for boats under 18′ with narrow beams.
1,200 Lumens in Great White
Size: 5.8” Length x 2.375” Width x .5” Height (147 x 60 x 13mm)
Operating Voltage: 10 – 30 Volts DC
Current Draw: 1.4 Amps @ 12 Volts
17 Watts of high efficiency LED light
40,000-Hour Lamp Life
120 degree light spread angle

scm-6 underwater boat lights


Next, we have the SCM-6 for medium-sized boats, 18′ – 22′. As boats grow in length they also grow in width. For that reason, your medium-sized boat needs the 1800 lumens of the SCM-6.

Whether on a sunset cruise or a night time fishing trip, your boat will light up the night. In other words, you’ll draw the attention of other boats and fish.

Best for medium-sized boats 18′ – 22′.
1,800 Lumens in Great White
Size: 7.2” Length x 2.375” Width x .5” Height (183 x 60 x 13mm)
Operating Voltage: 10 – 30 Volts DC
Current Draw: 2.1 Amps @ 12 Volts
24 Watts of high efficiency LED light
40,000-Hour Lamp Life
120 degree light spread angle

scm-10 cc


Finally, there is the SCM-10 for boats over 22′. Big boats need big light. And the SCM-10 gives you just that.

At 3100 lumens, this light is a beast. They will know what boat is yours because you’ll outshine every other boat at the dock.

Dazzle your guests at your next get-together, attract fish from the deepest waters, or romance your partner with the seductive glow of your underwater lights.

Best for boats over 22′.
3,100 Lumens in Great White
Size: 10” Length x 2.375” Width x 0.5” Height (254 x 60 x 13mm)
Operating Voltage: 10 – 30 Volts DC
Current Draw: 3.5 Amps @ 12 Volts
42 Watts of high efficiency LED light
40,000-Hour Lamp Life
120 degree light spread angle

These are single color lights that come in five popular colors.

LED Underwater Boat Lights in Five Great Colors

Aqua Green
Aqua Green
Bimini Blue
Bimini Blue
Great White
Great White
Cool Red
Cool Red

Color Changing LED Underwater Boat Lights

The SCM-10 also comes in a color-changing version, the SCM-CC. It gives you four of Shadow-Caster’s most popular colors, Great White, Bimini Blue, Aqua Green, and Cool Red, in one light.

Engineered to Last

Two engineers started Shadow-Caster back in 2007. At the time, they had over 20 years of combined experience designing precision electronics, optics, and military hardware.

In other words, they know how to build boat lights that will last.

Why is this important? Because boats are tough on LED lights.

Corrosive saltwater, pounding waves, and transient voltage spikes all take a toll on boat lights.

Knowing this, they design Shadow-Caster underwater boat lights using only the highest quality materials, electronics, and LEDs.

316 Stainless Steel

This is one of the most corrosion-resistant metals available. It stands up to even saltwater without corroding or pitting. Your lights will look brand new for the life of the boat.

316 stainless steel has the added benefit of pulling heat away from the LEDs. The LEDs stay cooler, shine brighter, and last longer.

Built-in Protection

Inside every Shadow-Caster LED underwater light is three circuits that protect the light from harm.
First, Thermal Protection circuitry protects the lights from overheating.

Next, Reverse Polarity circuitry protects the lights from being wired backward.

Finally, Surge Protection circuitry protects the light from the sudden voltage spikes that plague marine electrical systems.

LED Underwater Boat Lights That Fit Your Life

The best underwater lights for your boat depends on several things.

How big your boat is, how clean the water you boat in is, how much light you want, and your budget.

Because of this, Shadow-Caster builds lights in several different sizes and colors. And if you need more light at a later date, you can always add more. Even different sized lights!

Don’t be left sitting on the dock another summer. Buy your underwater LED boat lights today and start making more memories with your family and friends.

To buy, hold your mouse pointer over Underwater Boat Lights in the navigation at the top of this page. When the dropdown menu appears, move your pointer to the light you want then click on Buy Now. That will take you to the product page where you can make your purchase through a secure connection through PayPal.

Don’t Have a PayPal account? That’s O.K. You can create a PayPal account or check out as a guest. All it takes is a credit card and a few minutes of your time. I will process your order and promptly ship it out, usually by the next business day.


How to Install Underwater Lights
Boat Light Drawings Print, cut, and paste to check for fit and placement.

Proudly Made in the USA

1 Year Warranty

Shadow-Caster Underwater LED Boat Lights Come With A One Year Warranty!