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LED Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Clear Lens
Optronics

LED Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Clear Lens

Part Number: MCL57ACB
In Stock
$8.59
Trailer Lights
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Product Images

In Use/Installed

2-1/2" Round. Waterproof, LED trailer light serves as a side marker light or a clearance light. Durable polycarbonate lens and housing. Recessed mount with grommet (sold separately). Accepts standard 2-pin PL-10 plug. Amber LEDs. Great Prices for the best trailer lights from Optronics. LED Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Clear Lens part number MCL57ACB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - MCL57ACB

Highlights

  • Reliable In Any Weather: Sonically sealed, waterproof design keeps water out for lasting performance.
  • Bright, Low-Power Light: Three amber LEDs give clear visibility while drawing only 0.06 amps at 12.8V.
  • One Light, Two Uses: Works as a clearance or side marker light when properly mounted.
  • Durable Build: Polycarbonate housing and acrylic lens resist shock, vibration, and heat.
  • Simple Connection: Uses a standard 2-prong PL-10 plug for quick, clean wiring.
  • Road Legal: Meets DOT and FMVSS 108 standards for compliant trailer lighting.

Features to know about

Better Visibility and Efficiency: Bright 3-Diode LED Light

Older bulbs tend to dim over time and draw more power than they should. This 2-1/2" round light uses three amber LEDs that shine through a clear lens for a clean, bright output with very little power draw—just 0.06 amps at 12.8V. The LEDs last up to 50 times longer than incandescent bulbs and put out a consistent light without the heat or fragile filaments, so you get reliable illumination that stays bright night after night.

Protection from Water and Vibration: Sonically Sealed, Submersible Build

Wet roads, rain, or even full submersion won’t hurt this light. The polycarbonate housing and acrylic lens are sonically sealed into one waterproof unit that keeps water and dirt out of the circuit board. The solid-state LED design and surface-mount technology handle shock and vibration better than old-style bulbs, so it’s ready for hard use in all kinds of weather.

Clean Wiring Connections: Standard PL-2 Plug Setup

No need to splice or guess at wiring. The light uses an industry-standard PL-2 connection that accepts a 2-prong plug (A46PB or A86PB, sold separately). Power and ground connect directly through the plug, which also seals the unused terminal against moisture and debris. It’s a simple, neat setup that makes wiring dependable and easy to maintain.

Close-up image of the Optronics PL-2 wiring connection showing the three connection points for a two-prong plug used with LED trailer lights.

Tight Mounting Spaces: Compact Recessed Installation

When space is limited or you want a flush finish, this recessed-mount design fits neatly into your trailer surface using a grommet (A55GB, A56GB, or A57GB—sold separately). At just 2-1/2" in diameter and 1" deep, it stays low profile while giving off strong light from the front. That clean fit keeps it protected from snags while looking tidy and professional.

Image showing a recessed-mount trailer light installation where the round LED light sits flush within a grommet or mounting surface on a trailer.

Recessed-mount trailer light shown installed within a grommet, illustrating the flush fit of a round LED clearance or side marker light.

Dependable Compliance and Coverage: P2-Rated Performance

Safety on the road depends on meeting lighting standards. This P2-rated light provides a 45-degree beam to either side for a total of 90 degrees of coverage, perfect for use as either a clearance light or a side marker when installed correctly. It meets DOT and FMVSS 108 requirements in any 360-degree position, so you know it’s fully compliant wherever you mount it.

Specs

Dimensions

  • Overall diameter: 2-1/2"
  • Overall depth: 1"

Dimensional diagram of the Optronics MCL57 Series 2.5-inch round LED clearance or side marker light with clear lens and amber LEDs, showing light depth and diameter for installation reference.

Electrical

  • Power draw at 12.8V: 0.06 amps
  • Input voltage: 12V

Lighting

  • Diodes: 3

Warranty

  • LEDs: Lifetime warranty

MCL57ACB Optronics LED Clearance or Side Marker Light - Submersible - 3 Amber Diodes - Round - Clear Lens





Video of LED Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Clear Lens
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 LED Clearance or Side Marker Light Review

Speaker 1: Today we're taking a look at an LED amber clearance or side marker light from Optronics. This round trailer light can function as both a clearance light and side marker light when properly mounted. Features a sonically sealed waterproof housing and lens unit that is submersible. And it features durable surface mount technology when it comes to the construction of the LED circuit board. What that does, is it simply better withstand shock and vibration, and allows for improved heat distribution.Now this is a LED system. LEDs make great replacements for incandescent lights.

They last longer. They burn brighter and they're more efficient. With LEDs, you don't have to worry about replacing bulbs, and you don't have to worry about brittle filaments. This unit contains a durable polycarbonate housing with an acrylic lens. It is compatible with 12 volt electrical systems.

Now on the back side, it accepts an industry standard 2-prong plug which is sold separately and available at etrailer.com. Also, when it comes to the installation It's a grommet mount installation.Your mounting grommet is sold separately as well. Also available at etrailer.com if needed. It is Department of Transportation compliant. It meets FMVSS 108 requirements and any 360 degree position.

Taking a look at the dimensions real quick, then we'll hook it up to power. Overall diameter is 2-1/2". The overall depth of the lens area is 3/4 of an inch deep. We're gonna go ahead and hook it up to power.I have my 2-prong plug here. So it just plugs into the connection points around the back of the unit.

Presses in. Creates a nice tight fit. So you can see here that it sends out a nice, consistent signal. We have three LEDs with three diodes. So the multi-diode design really helps optimize the overall light output. Clear lens allows plenty of light to come through. Nice amber color. Power drill at 12.8 volts at 0.06 amps. And Optronics puts a lifetime warranty on the LEDs.And that's gonna do it for today's look at the Optronics LED amber clearance or side marker light.

Customer Satisfaction Score:

Ratings & Reviews

4.8

3107 reviews
5 Stars
(2702)
4 Stars
(270)
3 Stars
(57)
2 Stars
(21)
1 Star
(57)
Review sort icon
2-1/2" Round. Waterproof, LED trailer light serves as a side marker light or a clearance light. Durable polycarbonate lens and housing. Recessed mount with grommet (sold separately). Accepts standard 2-pin PL-10 plug. Amber LEDs.

by:

Fit perfectly where the old lights were. Perfect replacement.



by:

Great looking product. Very well made. Perfect fit.
Great shopping experience and fast shipping.



by:

I replaced the original amber bulb side marker lights with these etrailer LED multifunctional lights on my RV and they work great. The original lights didn't blink when marking turns and I wanted drivers to have a better indication when I wanted to change lanes. I had to do some minor rewiring, but I'm pleased with the outcome.



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This is the second one of these lights I’ve installed on my trailer, and no issues so far!



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The clearance lights were just what I was needing very pleased



by:

Installation is super easy. Much better than the flush plugs on the other options models. Lights brightly.
Specs should include the following:
Mounting hole needs 1/4 inch minimum, and nut is 10mm.



by:

Thank you for the fast shipping, and the light was an exact match, will use e trailer for all my trailer lighting needs.



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Easy ordering, fast shipping, fair price... what more could you ask for?



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Super fast shipping. Product was as described and works perfectly as replacements on my motorhome. Very happy with this experience.



by:

I bought the led lights over a year ago and even with MI winters and all the road salt the are still working perfectly. Great product you won't go wrong buying them.



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Ordered the LED trailer pucks. They came really quickly, and the bonus was they already had dielectric grease on the female contacts and ready to install. I was pleasantly surprised.



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I thought yall were just trailers , was not aware did boat as well, thanks deliver in great shape



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The lights went on easy with one positive wire and ground. Being led makes it brighter than my old lights



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Had trouble tracking these specific lights down online. I have bought a few things from etrailer before and they always deliver exactly as advertised. These are a direct replacement for the lights that I had which seemed impossible to find!



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The light works excellent. Unfortunately after I took the old one off I realized that the original was never wired up correctly from the factory lol. New light is much brighter so I might go ahead and replace the other two. Received very quickly.



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These Optronic LED lites were exactly what I was looking for my boat trailer. Easy install and very bright. Good product and quick shipping. I highly recommend this company.



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Really good lights



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Delivery was fast and color was indicated on the back of the light.


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See what our Experts say about this Optronics Trailer Lights


Info for this part was:

Employee Dustin K
Video Edited:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee David F
Installed by:
David F
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Edited by:
Daron K
Employee Brian T
Written by:
Brian T

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