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

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

Part Number: MCL57RCB
$8.88
Trailer Lights
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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. Red LEDs. Great Prices for the best trailer lights from Optronics. LED Clearance or Side Marker Trailer Light - Submersible - 3 Diodes - Round - Clear Lens part number MCL57RCB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - MCL57RCB

Highlights

  • Reliable In Any Weather: Sonically sealed waterproof housing keeps water out for lasting performance.
  • Fewer Replacements Needed: 3 red LEDs last 50 times longer and use less power than incandescent bulbs.
  • One Light, Two Functions: Works as a clearance or side marker light when properly mounted.
  • Simple Power Connection: Accepts standard 2-pin PL-10 plug for quick 12V hookup.
  • Strong and Shock-Resistant: Durable polycarbonate housing with SMT circuit design resists vibration.
  • Road Legal: DOT compliant and meets FMVSS 108 standards in any 360-degree position.

Features to know about

Brighter and More Efficient Lighting: 3-Diode LED Power

Old incandescent bulbs can dim over time and burn out when you need them most. This 2-1/2" round light uses three red LEDs that put out a crisp, bright beam while drawing only 0.06 amps at 12.8V. The low power draw means less strain on your wiring and a longer service life for each diode. It’s an easy upgrade that gives better visibility and fewer maintenance headaches, all while using less energy.

Keeping Out Moisture and Corrosion: Sonically Sealed, Waterproof Build

If your trailer sees wet roads or hits the ramp, water damage can be a real problem. The housing and clear lens on this light are sonically sealed together to form one waterproof unit that’s fully submersible. That tight seal keeps moisture out and protects the circuit board so your lights stay clear and reliable every time you tow, even after repeated submersion.

Built to Handle Shock and Vibration: Durable SMT Construction

Rough roads and constant vibration can shake ordinary lights apart. This light uses durable surface-mount technology (SMT) for its LED circuit board, which helps it withstand vibration and impact while also improving heat reduction. That tough construction means fewer failures, no brittle filaments, and steady illumination even when the road gets rough.

Clean Installations Made Simple: Recessed Mount with Standard Plug

Installing this light is straightforward thanks to its recessed-mount design and standard PL-2 connection. It accepts any industry-standard 2-prong plug for power and ground, protecting the unused contact from dirt and moisture once connected. The 2-1/2" diameter housing fits neatly into a grommet (sold separately), giving a flush, professional look without extra drilling or adapters.

Close-up of Optronics PL-2 wiring connection showing three-pin layout for LED trailer light installation

Recessed-mount LED trailer light installed in grommet showing how the light fits into the trailer surface

Reliable Compliance and Performance: DOT Approved P2 Rating

Safety standards matter when you’re on the road. This light is DOT compliant and meets FMVSS 108 requirements in any 360-degree position. The P2 rating provides a 90-degree total beam spread—perfect for use as a clearance or side marker light when properly mounted—so other drivers can clearly see your trailer day or night.

Specs

Dimensions

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

Technical diagram of Optronics MCL57 Series 2.5-inch round submersible LED clearance or side marker light with clear lens and red LEDs

Electrical

  • Input voltage: 12V
  • Power draw at 12.8V: 0.06 amps
  • Diodes: 3

Warranty

  • LEDs: Lifetime warranty

MCL57RCB Optronics LED Clearance or Side Marker Light - Submersible - 3 Red Diodes - Round - Clear Lens





Video of LED Clearance or Side Marker Trailer 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 A Closer Look at the LED Clearance or Side Marker Trailer Light

Speaker 1: Today we're taking a look at an Optronics LED clearance or side marker light. This round trailer light can function as both a clearance light and side marker light when properly mounted. It features a sonically-sealed, waterproof housing and lens unit that is submersible. It also features durable surface-mount technology when it comes to the construction of the LED circuit board. That design better withstands shock and vibration and allows for improved heat distribution.Now this is an 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 one features a nice durable polycarbonate housing with an acrylic lens. It is compatible with 12-volt electrical systems, and here on the back, it accepts an industry standard two-prong plug which is sold separately and available at etrailer.com.Also, when mounting, it's a grommet-mount installation, and the grommet is sold separately as well, also available at etrailer.com if needed.

It is Department of Transportation compliant. It meets FMVSS 108 requirements in any 360-degree position. When it comes to the overall diameter of the unit, that's measuring edge to edge, it's about two-and-a-half inches. The overall depth, I'm just measuring the lens, it's three-quarters of an inch. It contains a total of three LEDs.Now we're going to go ahead and hook it up to power.

That way you can see what it looks like with some power running to it. Then we'll also turn off our overhead lights so you can see it in a low-light setting. So here's a two-prong plug. It goes directly into the connection points around the back of the light, pushes in. So you can see here the light sends out a nice bright consistent signal, three diode or three LED design really helps optimize the overall light output.

Power draw at 12.8 volts is 0.06 amps, and Optronics puts a lifetime warranty on the LEDs.That's going to do it for today's look at the LED clearance or side marker light from Optronics.

Customer Satisfaction Score:

Ratings & Reviews

4.8

3099 reviews
5 Stars
(2695)
4 Stars
(269)
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. Red LEDs.

by:

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.



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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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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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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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nice light



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Rolf profile picture

Rolf

3/16/2022

great



by:

Perfect replacement and timely delivery



by:

Purchased LED lights to re-wire a 12-year old trailer. etrailer had all the lights/gaskets needed. Perfect fit to the original OEM lights.



by:

Process was quick and easy. Website is user friendly



by:

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



by:

Great product and fast shipping !



by:

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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See what our Experts say about this Optronics Trailer Lights

  • Recommended 2" Diameter Submersible White LED Light
    The best option for a 2" diameter, submersible, WHITE LED light is going to be the Miro-Flex LED Utility Light item # OPT57FR. These won't be stamped DOT approved because they are not reverse lights. We don't have any options that are. You will want to check with your local highway patrol office to see if you can run white lights on the side of your trailer. To help with your installation you can use the 2-Wire Pigtail item # A45CB or the Right Angle 2-Wire Pigtail item # A49PB.
    view full answer...
  • LED Clearance or Side Marker Trailer Light in Red
    For a complete set in red we have the Optronics LED Clearance or Side Marker Trailer Light - Submersible - 5 Diodes - Round - Red Lens item # MCL52RMB. If you are wanting an exact set up like the Optronics Miro-Flex LED Clearance or Side Marker Light w/ Grommet and Pigtail - Submersible - 3 Diodes - Amber item # MCL51CAK you referenced you will need the following parts: LED Clearance or Side Marker Trailer Light - Submersible - 3 Diodes - Round - Clear Lens item # MCL57RCB Right Angle...
    view full answer...

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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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