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Thinline LED Clearance or Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber Lens - 24V
Optronics

Thinline LED Clearance or Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber Lens - 24V

Part Number: MCL65A24B
$7.49
Trailer Lights
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3-15/16" x 1-1/4" Rectangle. Waterproof light functions as a clearance light or side marker light when properly mounted. Durable polycarbonate housing and lens. Surface mount - hardware not included. Accepts 1- or 2-wire plugs. P2 rated. Great Prices for the best trailer lights from Optronics. Thinline LED Clearance or Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber Lens - 24V part number MCL65A24B can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - MCL65A24B

Highlights

  • Reliable In Any Weather: Sonically sealed housing keeps water out for true submersible use.
  • Fewer Replacements Needed: LEDs last 50 times longer and draw only 0.025 amps at 24V.
  • Bright and Efficient: 3 white LEDs behind an amber lens give clear 90° P2-rated coverage.
  • Simple Surface Mount: Installs flat with a bracket and standard 1- or 2-wire plugs.
  • Tough Build: Durable polycarbonate lens and housing resist impact and moisture.
  • Compact Size: At 3-15/16" x 1-1/4" x 7/8", fits slim spaces for clearance or side marking.

Features to know about

Brighter, Longer-Lasting, and Efficient: LED Clearance and Side Marker Light

Old incandescent lights just can’t match the clarity and staying power of LEDs. This thinline rectangular light uses 3 white LEDs behind an amber lens to give bright, even illumination while drawing only 0.025 amps at 24V. You get strong visibility without straining your electrical system or worrying about burnt-out bulbs. With no filaments to fail and a lifetime warranty on the LEDs, it’s a reliable upgrade built to last.

No More Water Damage: Sonically Sealed and Fully Submersible

If your trailer sees wet roads or launch ramps, this light is ready for it. The housing and lens are sonically sealed into a single waterproof unit that keeps moisture out completely. That means no corrosion, no damage to the diodes, and no foggy lenses from water intrusion. It’s built to stay dry and keep shining bright—even below the surface.

Tight Spaces Made Simple: Thinline Surface Mount Design

Space is sometimes limited, and this compact light fits easily almost anywhere. Measuring 3-15/16" long by 1-1/4" wide by 7/8" deep, it mounts flush against the surface using a bracket and small wiring hole. It accepts standard 1- or 2-wire plugs, so hooking it up is quick and clean without extra adapters or complicated wiring.

Clear Visibility for Safer Travel: P2-Rated Beam Pattern

For effective marker or clearance lighting, this P2-rated design delivers a 90-degree total beam spread—45 degrees to each side of centerline. That focused output helps others see your trailer straight on, improving safety at night or in low-light conditions. When installed correctly as either a clearance or side marker light, it adds dependable visibility exactly where you need it.

Built Tough to Last: Durable Polycarbonate Housing and Lens

Road grit, UV exposure, and vibration won’t faze this one-piece polycarbonate build. Both the lens and housing resist impact and wear over time while keeping the LEDs protected inside. It’s a solid light that keeps working trip after trip without cracks, leaks, or dulling lenses.

Specs

Quantity

  • Quantity: 1 clearance/marker light

Dimensions

  • Length: 3-15/16"
  • Width: 1-1/4"
  • Depth: 7/8"

Dimensional diagram of Optronics MCL65A24B Thinline LED amber trailer clearance or side marker light showing length, width, and depth measurements.

Electrical

  • Power draw at 24V: 0.025 amps

Lighting

  • Diodes: 3

Warranty

  • Lifetime warranty on LEDs

MCL65A24B Optronics Thinline Sealed LED Clearance or Side Marker Trailer Light - Amber Lens - 24V - P2 Rated





Video of Thinline LED Clearance or Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber Lens - 24V
Video Thumbnail Video Player Dialog

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for All About the Thinline LED Clearance or Side Marker Light

Speaker 1: Today we're taking a look at Optronics Thinline Sealed LED Marker and Clearance Light. This light is designed for 24-volt systems. The small, rectangular trailer light functions as both a clearance light and a side-marker light when properly mounted.It features a sonically-sealed, waterproof design when it comes to the housing and lens unit. It is submersible.LEDs make great replacements for incandescent lights. They last longer, they burn brighter, and they're much more efficient. You don't have to worry about changing bulbs, and you don't have to worry about burnt out filaments with LED systems.This unit features a polycarbonate lens and housing that's very strong and durable.

It has a nice yellow lens on it.This light mounts using a mounting bracket. The mounting brackets are sold separately and available at etrailer.com. This would be an example of a mounting bracket here.On the back of the light, we have two prongs. The prongs would line up right there in the bracket. Then the bracket would grab through the mounting hardware.

Then it provides a single wire for a power wire.Now each bracket might be a little differently on how it grounds and how it wires. Basically, all you got to do is plug this into the bracket, and then the bracket will provide the wiring that you need for your application.That's really all there is to it. The brackets are available at etrailer.com. They are sold separately.This is a P2-rated light. It's SAE and Department of Transportation compliant.When it comes to the overall dimensions, starting with the overall length measuring edge-to-edge, it gives us a measurement of 3-15/16" long.

The overall width is 1-1/4". The overall depth from front to back is about 7/8" deep.This unit contains a total of three diodes or three LEDs. We're going to go ahead and hook it up to power. Then you'll be able to see what it looks like. I'll also turn the overhead lights off.What I'm going to do is just plug this into the bracket.

Again, brackets are sold separately, available at etrailer.com, and then I'll go ahead and hook this up to power.So you can see here the light sends out a nice, consistent signal. Again, it contains three LEDs or three diodes. The multi-diode design really helps optimize the overall light output. Optronics puts a lifetime warranty on their LEDs.That's going to do it for today's look at the Optronics Thinline Sealed LED Amber Marker and Clearance Light.

Ratings & Reviews

4.8

2654 reviews
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4 Stars
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3 Stars
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3-15/16" x 1-1/4" Rectangle. Waterproof light functions as a clearance light or side marker light when properly mounted. Durable polycarbonate housing and lens. Surface mount - hardware not included. Accepts 1- or 2-wire plugs. P2 rated.

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Fits in rubber gasket for Skeeter ZX 250 trailer



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The Lights are working great. I just now ordered another.



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SPLENDID! Popped the old incandescent Side Marker Lights out on my 2008 Triton 21X2 trailer and installed these Thinline LED Clearance and Side Marker Lights (both the AMBER and RED ones). Just Plug-N-Play and my boat trailer looks AWESOME! Shipping was a snap!



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Exactly as described on the website. Shipping was pretty quick also. Thanks!



by:

These Thinline led lights replaced my incandescent ones perfectly as id lights for my boat trailerl. etrailer has great pricing and the item was in stock. These are brighter than oem and should outlive the original lights. This decision was made easily to upgrade to these. Friends of mine as well as myself have made purchases from etrailer before and have been very satisfied with our purchase. Customer service is good. No reason to look anywhere else.



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Direct fit for the original incandescent markers! Nice upgrade!



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I bought my Haulmark 12'x6' Enclosed trailer used a few months back. The trailer was in good shape but the sun faded out the marker lamps. Since I use the trailer as a landscape equipment trailer I'm usually not working at night but now with the daylight savings hour change I find myself getting home when it's dark and now those faded lamps were bugging me. Since I've had great experience in the past with etrailer.com I decided to take the plunge and change out the 14 marker lights to their LED versions...Wow what a difference. Not only are my lamps no longer sun faded but they are bright! Definitely was worth the money and the installation was quick since they simply snap into place.
Thanks,
RAM



by:

I bought my Haulmark 12'x6' Enclosed trailer used a few months back. The trailer was in good shape but the sun faded out the marker lamps. Since I use the trailer as a landscape equipment trailer I'm usually not working at night but now with the daylight savings hour change I find myself getting home when it's dark and now those faded lamps were bugging me. Since I've had great experience in the past with etrailer.com I decided to take the plunge and change out the 14 marker lights to their LED versions...Wow what a difference. Not only are my lamps no longer sun faded but they are bright! Definitely was worth the money and the installation was quick since they simply snap into place.
Thanks,
RAM



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Exact replacement for 2008 Skeeter (easy loader) trailer



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Perfect match for the broken one on my boat trailer



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This is an exact replacement side marker light for my 2005 Nitro boat trailer! Thanks for having what I needed and shipped it to me really quick.



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Easy to install and looks to be a exact replacement for the factory installed running lights on my boat trailer.



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Perfect fit for replacing my old enclosed trailer lights. Price was good as well



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They fit perfectly! Shipping was fast. Great deal overall!



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There was only one power base in the package with two plug in amber lenses. I had to call customer service to get a second power base shipped out.



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Wow, what a difference LED clearance lights make, especially at night. It makes my business information really stand out and people who follow me really notice that. I've been wanting to go LED the past couple years and now that I recently made the change, I'm not ever going back to standard low-level light bulbs again. Thanks etrailer for offering these lights and at a very affordable price. You were almost half the price as our local part store was selling them for, plus these are more stylish as well.



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Perfect replacement for older Shorelander fender marker light. The connections are more near center than end to help fit wires.



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Tight fit for the plugs behind the fixture to prevent accidental disconnection.



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Perfect replacement for Supreme box truck. Perfect plug and play



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Boat Trailer: Following a highly successful conversion of the brake/tail & DOT lights, I went ahead with changing the amber running/side maker lights. Working with Hally made ordering smooth and simple. The parts arrived via USPS as expected in excellent condition.
The new LEDs fit perfectly into the OEM housing, so I chose not to change them at this time. THe difference in illumination is just outstanding!!!
I will definitely use eTrailer again with two great experiences on this project.
Seeing the outcome, I cannot explain why it took me so long to decide to convert.



by:

Great service! Found specialty parts quickly. When I needed questions answered, quality was evident in all responses. This is my go to partner for all things lights!!



by:

Exact replacement for the missing side marker light on my Nitro boat trailer. As usual, etrailer shipped promptly and the package arrived within a few days.



by:

Purchased the light because of it's size and being water proof. Light has been installed on a bike rack and works great.



by:

Great replacement for my incandescent lamps. I did run into a problem with the connector in that I could not get it to seat all the way without applying an excessive amount of force, so I opened up the socket on the lamps slightly with a small screwdriver inserted in the slot on the metal socket collar. It appeared as if the trailer plug was slightly thicker than the socket expected. After install, the light is nice and bright, and the current draw is much less.



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See what our Experts say about this Optronics Trailer Lights

  • Recommended Trailer Fender and Lights for Boat Trailer with 13" Wheels
    You can use the Fulton Single Axle Trailer Fenders with Top and Side Steps # F008574-2 which are designed to be used with wheels up to 14" large, so they'll work with your 13" wheels. To mount these fenders you'll want to use the Galvanized Steel, L-Shaped, Bolt-On Brackets for Plastic # PF775-BKT-2; you could also use the existing brackets you've got on your trailer if you'd like. For the lights, you can use the Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle...
    view full answer...
    Image 1 for
  • Submersible Red and Amber Fender Running or Side Marker Lights for Fulton Fender # F008574-2
    I went out to the warehouse to measure the fenders # F008574-2 for you. The angled portion is 5-1/4 inches by 2-7/8 inches, so you could absolutely add a light there. We don't have the exact light measurements you gave but we do have other submersible options. My recommendation is the Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber Lens # MCL65A24B and Red Lens # MCL65RB with Black Bracket and Single Wire Plug for Thin Line Series Trailer Clearance...
    view full answer...
    Image 1 for Image 2 for
  • Are There 24 Volt Red and Amber Trailer Clearance Lights
    There are round clearance lights (marker lights) that are 24 volt compatible, but the closest in diameter we have to what you are looking for is 2 inch diameter lights: - LED Trailer Clearance or Side Marker Light - Red Lens # MCL55R1224B - LED Trailer Clearance or Side Marker Light - Amber Lens # MCL55A1224B - 2" Round Grommet - Flush Mount # A54GB - Right Angle 2-Wire Pigtail # A46PB Those are flush-mounted lights but there are also 24 volt surface-mounted lights: - Optronics Thinline...
    view full answer...

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Info for this part was:

Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
Employee Daron K
Edited by:
Daron K
Employee Brian T
Written by:
Brian T

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