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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
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$7.60
Retail:$10.34
You Save: 26%
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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

2633 reviews
5 Stars
(2361)
4 Stars
(188)
3 Stars
(38)
2 Stars
(18)
1 Star
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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.

by:

I have a 2006 Brenderup Horse Trailer. My side markers were destroyed by the sun and intermittently working. I found what I thought would be an exact match on etrailer after looking high and low on the internet everywhere else. Normally I'd get an out of stock message. etrailer's model 19 lamps worked perfectly. Best thing was I did not have to buy and replace the base (also hard to find online). I just had to snap the old ones out and snap these in. Now our trailer and horses are as safe as can be, barring unsafe and stupid drivers on the road, who seem to be unsafe and stupid no matter whether or not my lights are working. LOL. Just sayin.



by:

Much brighter light from all viewing angles than the OEM lights. Easy snap in replacement if it ever fails. The self grounding one-wire base would have made my install easier. The two prong plug I ordered was a tight fit but it worked.

I would recommend etrailer.



by:

Looks really nice and they are bright.



by:

I decided it was time to repair the lighting on a 15 year old trailer due to several being broken, and the rest being very faded. I spent quite a bit of time on etrailer comparing options I finally settled on the 4 diode led's. I was excited to see the difference but was ultimately dissapointed with my decision to swap out the old incandescent with more costly led's as the new led lights put out significantly less light. As u can see in the pictures I did the passenger side first, then I took pics halfway thru. If u look at the driver side with old lights it has alot more light even though it only has only 2 working lights, compared to the 4 on the new side! In the front shot u can see the old on the right is casting 10 times the amount of light on the ground. On the plus side at least the orange is now orange, and the red is red instead of almost clear.

I will say the shipping was very fast, and the the customer service was awsome as always.



by:

Nice and bright, look great. Good quality. Installed with new self grounding housings.



by:

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!



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.



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



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



by:

I love the final look of these! Very bright and clear! However I needed to modify the chrome frame, cutting off the angle piece so that I could plug both connectors in fully, it wouldn't work otherwise. Also the tiny screws that came with it were a joke. I needed to substitute bolts, washers and lock nuts to secure it to my 1997 Shoreland'r Trailer.



by:

Exact replacement for 2008 Skeeter (easy loader) trailer



by:

Fits in rubber gasket for Skeeter ZX 250 trailer



by:

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



by:

Direct fit for the original incandescent markers! Nice upgrade!



by:

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



by:

Perfect match for the broken one on my boat trailer



by:

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.



by:

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



by:

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



by:

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:

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.



by:

Perfect replacement for Supreme box truck. Perfect plug and play



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:


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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...


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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