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

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

Part Number: MCL57RB
In Stock
$6.91
Trailer Lights
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In Use/Installed

Customer Photos

2-1/2" Diameter. 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. P2 rated. Great Prices for the best trailer lights from Optronics. Optronics LED Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens part number MCL57RB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - MCL57RB

Highlights

  • Reliable In Any Weather: Sonically sealed housing and lens keep water out for lasting use.
  • Fewer Replacements Needed: LEDs last 50× longer and draw just 0.06 amps at 12.8V.
  • One Light, Two Functions: Works as a clearance or side marker light when properly mounted.
  • Simple Power Hookup: Accepts standard 2-pin PL-10 plug for quick connection.
  • Solid Build: Durable polycarbonate housing and acrylic lens resist shock and vibration.
  • Road Legal: DOT compliant and meets FMVSS 108 requirements for safe visibility.

Features to know about

Bright, Efficient Lighting That Lasts

Older incandescent lights wear out fast and pull more power than they should. This 2-1/2" round LED clearance or side marker light uses 3 white LEDs under a red lens to give you bright, clean light with a low draw of just 0.06 amps at 12.8V. The solid-state LEDs last up to 50 times longer than bulbs and don’t have fragile filaments to break. It’s efficient, long-lasting, and maintenance-free—just reliable light every time you flip the switch.

No More Water Damage or Fogged Lenses

Moisture ruins most trailer lights over time, but this one’s built to handle it. The housing and lens are sonically sealed into a single waterproof unit that’s fully submersible. Whether it’s rain, road spray, or a launch ramp dunk, water can’t get in to corrode the circuit board or diodes. It keeps shining bright and clear even after repeated exposure to wet conditions.

Built Tough for Rough Roads

Vibration and impact are hard on lights, especially when you’re hauling over uneven ground. The Optronics design uses durable surface-mount technology (SMT) on the LED circuit board to better resist shock and heat buildup. Add in the tough polycarbonate housing and acrylic lens, and you’ve got a light that can take bumps and still work like new without flickering or cracking.

Clean Install with Standard Connections

Wiring doesn’t have to be complicated. This light uses an industry-standard PL-2 connection that accepts a simple 2-prong plug for power and ground (sold separately). The plug also seals the unused terminal against dirt and moisture. It mounts recessed with a grommet (sold separately), sitting flush and protected while giving your trailer a clean, finished look.

Image of recessed-mount trailer light installed flush within a mounting surface, demonstrating mounting depth and fit.

Compliant and Road-Ready

DOT compliant and meeting FMVSS 108 standards in any 360-degree position, this P2-rated light delivers a consistent 90-degree beam spread for clear visibility straight on. It’s built for reliability, efficiency, and safety right out of the box—with a lifetime warranty on the LEDs for extra peace of mind.

Specs

Dimensions

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

Diagram of the Optronics MCL57RB round LED waterproof clearance or side marker light with red lens and three LEDs showing construction details.

Electrical

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

Close-up of the Optronics PL-2 wiring connection showing the two active contact points and sealed third point for LED trailer light installation.

Lighting

  • Diodes: 3

Warranty

  • LEDs: Lifetime warranty

MCL57RB Optronics LED Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens

Alternate part number: MCL-57RB





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" Diameter. 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. P2 rated.

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Fits perfectly just like factory.



by:

These are exactly what I was looking fo r.



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by:

Nice fixture completely replaced the old filament style fixture. Priced right..



by:

As described. Fit great. Bright



by:

Excellent service would buy from this sell again



by:

Received complete order as ordered good quality and prices.



by:

Of the three of these lights that I ordered, two showed up in plastic bags and intact, one was not in a wrapper and was broken. It was obvious that whoever packaged it either didn’t notice or didn’t care.

Sierra K. profile picture

Sierra K.

9/24/2021

Sorry to hear that. Customer Service will reach out about the broken light.



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Product met all expectations.



by:

Lights are fine, the big deal here is the excellent service and friendly staff! Very helpful.



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good, good



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I purchased $XX worth of led lights 6 marker lights and 2 ovals. The marker light had a protective wrapper and showed up pristine condition, however both ovals were thrown in the box with no protective wrapper the clear oval has a scratch but is still in good condition the red oval has scratches all over it to the point it looks used. Pretty Sad. Wish I could off included photos but it was hard to see the scratches In the picture my camera isn't the greatest.



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Great product and shipping was very fas t.



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Excellent to deal with and fast shipping



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Very fast shipping and excellent Customer Service.
Keep up the good work

Lynn



by:

Good lights, work well and easy to install. Would give 4 stars but one of them arrived with a chipped housing. Hoping it will be okay because it's behind the grommet so shouldn't see much water.



by:

Great replacement for my old incandescent lights. Work well and easy to install.



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Excellent Service and great prices! Enjoy this website!



by:

Exact housing replacement for my Tennessee Trailer rear side clearance light. Now LED. !



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Direct replacement for what I had. etrailer always has the products, support, great pricing and shipping options that make shopping with them a real pleasure.



by:

Excellent clearance markers for the boat trailer, and at a price I can really appreciate. Installation was a breeze, and my trailer is finally safe again in the dark.



by:

Nice, bright and easy to install. A much needed upgrade from the incandescent bulbs. Makes my boat trailer look great!



by:

Excellent quality part. And very quick delivery. I've ordered a number of items from etrailer, very good service.



by:

It looks really nice now with the LED trailer Clearance/Side Marker light.


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See what our Experts say about this Optronics Trailer Lights

  • Replacement 2-1/2 Inch Round Marker Light on Triton Trailers Elite WCII Personal Watercraft Trailer
    I do not have a cross reference chart for Truck-Lite trailer lights, but we have several 2-1/2 inch round clearance lights that may work for you. I have attached a link that will take you to all of our 2 inch and 2-1/2 inch round trailer lights for you to check out. I have also linked a few LED and incandescent 2-1/2 inch round clearance lights for you to checkout below. The biggest difference between many of these lights is the depth of the lens. Most of the lights are either 11/16 inches...
    view full answer...
  • Replacement Rear Trailer Marker Lights For A 2-3/4" Cutout Hole
    For a 2-3/4" cutout hole we currently only have two options, the Optronics # A56GB (closed back) and # A57GB (open back). These grommets are compatible with lights like the Optronics # MCL57RB or # OPT94FR. You'll need a 2-pin wire harness # A46PB to connect the lights to your trailer's wiring.
    view full answer...
  • Replacement Clearance Lights for a 1977 Rancho El Rae Camping Trailer
    Unfortunately even with the mounting dimension it will be difficult for me to recommend a replacement lense cover for a trailer that old without knowing the brand and model number of the lights you have installed. Therefore, I recommend replacing the lights on your trailer with a set of new LED lights that way you will not have to worry about them for some time. For the circular lights on your trailer I recommend using the LED Trailer Clearance/Side Marker Light part # MCL57RB for red...
    view full answer...
  • Availability of a 2 Inch Diameter LED Trailer Light
    We currently don't stock a 2 inch that is 11/16 inch deep. The closest we have are two and a half inch and 11/16 inch deep LED red lights: # MCL59RB # MCL57RB Another very close option would be Optronics GloLight LED # MCL155RB. It's 2 inch diameter and 3/4 inch deep. You may need # A46PB two wire pigtail for sealed trailer clearance, side marker lights.
    view full answer...
  • Do You Have Replacement 2-1/2 Inch Round Red Light Lenses
    We have many 2-1/2 Inch round red lights, but unfortunately we do not have just the lenses in that diameter. I have linked the page for you of the lights we carry in that size.
    view full answer...
  • Recommended Clearance Light And Grommet For Older Snowmobile Trailer Rebuild
    The clearance light I recommend for your snowmobile trailer is part # MCL57RB. This is a 3 diode 2-1/2 inch round light. It does require a rubber grommet for installation. The grommet to use for installing this light I recommend is part # A57GB. You may need to take a small round file and open the mounting hole you said measured about 2-5/8 inches but this should work well for your trailer. To connect the light to your trailer wiring I recommend using the Two Wire Pigtail, part # A46PB....
    view full answer...

Do you have a question about this Trailer Light?


Info for this part was:

Employee Tyler C
Written by:
Tyler C
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Cole B
Installed by:
Cole B
Employee Chad S
Video Edited:
Chad S

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