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

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

Item # MCL55RB
Our Price: $5.44
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Shipping Weight: 0.06 lbs
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Optronics LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens Submersible Lights MCL55RB
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2" Diameter round. Waterproof, LED trailer light serves as either a side marker or clearance light when properly mounted. Durable polycarbonate housing. Flush mount with grommet (sold separately). Accepts standard 2-prong plug. P2 rated. Great Prices for the best trailer lights from Optronics. Optronics LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens part number MCL55RB can be ordered online at or call 1-636-306-4830 for expert service.
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  • Reviews (74)
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Optronics Trailer Lights - MCL55RB

  • Clearance Lights
  • Round
  • LED Light
  • Red
  • 2 Inch Diameter
  • Recessed Mount
  • Rear Clearance
  • Side Marker
  • Submersible Lights
  • Optronics

2" Diameter round. Waterproof, LED trailer light serves as either a side marker or clearance light when properly mounted. Durable polycarbonate housing. Flush mount with grommet (sold separately). Accepts standard 2-prong plug. P2 rated.


  • Round LED trailer light functions as a clearance light or a side marker when properly mounted
  • Sonically sealed, waterproof housing and lens unit is submersible
  • LEDs make great replacements for incandescent lights
    • Last 50 times longer
    • More efficient - provide brighter light with less power output
    • No bulbs to replace - no brittle filaments
  • Durable polycarbonate housing and lens
  • Red lens over white LEDs
  • Compatible with 12V DC electrical systems
  • Flush mount to trailer with grommet (A54GB - sold separately)
  • Accepts industry standard 2-prong plug (A46PB or A86PB - sold separately)
  • DOT compliant
  • P2 rated


  • Dimensions: 2" diameter x 1" thick
  • Diodes: 3
  • Power draw at 12.8V: 0.06 amps
  • Lifetime warranty on LEDs

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # LED2000-4R
Truck Lite # 30250R
Grote # 47112
Peterson # M164R
Maxxima # M30250R

Optronics MCL55 Series LED Marker Clearance Light Dimensions

Sonically Sealed, Waterproof Trailer Light

The waterproof construction of this light makes it ideal for use on trailers that may be submerged, like a boat trailer. The housing and lens are sonically sealed together to create a single unit, which means that water will not get into the light and damage the diodes or circuit board.

P2-Rated Lights

Diagram of light spread for P2 rated light

A P2-rated light produces a 45-degree angle of light to either side of its centerline for a total of 90 degrees of coverage. This beam pattern can be seen straight on, but it cannot be seen clearly from the side. So this type of light can be used as either a side marker light or a clearance light, but it cannot function as both. If you need both functions, then you must install 2 separate lights on your trailer - one as a front or rear clearance light and one as a side marker light.

MCL55RB Optronics LED 12V Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens - P2 Rated

Alternate part number: MCL-55RB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens - MCL55RB

Average Customer Rating:  4.9 out of 5 stars   (74 Customer Reviews)

2" Diameter round. Waterproof, LED trailer light serves as either a side marker or clearance light when properly mounted. Durable polycarbonate housing. Flush mount with grommet (sold separately). Accepts standard 2-prong plug. P2 rated.


Exact fit for both of my trailers. Great service and communication with all the people involved with filling my orders.


The Optronics LED Trailer side marker light was the exact replacement piece that I needed for my snowmobile trailer. I was pleased with the ordering process and the price was very reasonable. I have used this site for many previous orders and I will continue to recommend it.


Excellent product and easy to install as a replacement of the original marker lights.


I broke a rear side marker light on my utility trailer. The etrailer LED 2in replacement matched the original and the R&R took less than 5 minutes. Ordering and shipment services were accurate and efficient; price including S&H was within reason for this type of light assembly.

Replacement light continues to work well in its intended function.
Jim D - 06/24/2017


I used these lenses for the lights on the signal arm on a scale railroad signal for our kids playroom.


Great product. Not only do these replacement marker lights give my auto trailer an updated, or modern look they also greatly enhance its visability to others on the road. This is a huge safety improvement. They were also a snap to install, approximately 2 minutes each including clean up of the wiring connectors. I love them.


Have not yet had time to install the LED lighting items I recently purchased to refurbish my car trailer.
I will say however that the customer service I experienced from etrailer was bar none the best I've ever encountered.
Items received were correct and expertly packaged as well.
Thank you for the great experience!


Easy installation, connections cam PRE die-electric greased which was a nice bonus!

I did buy new grommets with these as well.

Bright and should last a lifetime!


Good and bright


My order arrived sooner than I excepted.
trailer light appear to be the same great quality as all products I have purchased from etrailer.
I am gathering all the parts and pieces for a small travel trailer that I am converting to a 4 place ATV trailer. Will not be installing until spring.


Exact match for my existing led running lights. I can always find what I need on their extensive website. etrailer always delivers great products and service. Thanks!


I have been very happy with all the purchases I have made at etrailer parts arrive on time and our what I expect i’d like to thank you and your staff for the service I provide


Had a gator made trailer with the rear lights out. looked up on this site and got exactly what I wanted. popped them right in. perfect fit. great delivery. thanks


as always etrailer has made maintaining my multiple trailers easy by being able to find the right parts in one spot !


As described, excellent customer serviceand all my parts arrived in 2 days. will get all my future business.


Great products and always outstanding service from the etrailer group.


Product produces a very bright light for its' size. Very pleased with it.

Very good product
Evo C - 06/07/2017


Very happy with the lights, bright and match what we had on the truck. Will be buying from etrailer again.


i have made a few purchases from etrailer and never had a problem its a great site for all your trailer needs


Perfect replacement for incandescent li ghts.


Looks like this light will work just fine time will tell Etrailer delivered on time i will buy all my trailer stuff here


Great product, great quality . I replaced the lights on a 6 X 12 trailer. They work great.


Products were as ordered and as needed. Self rewire project went very well and has functioned flawlessly.


Nice and bright!

Still nice and bright!
Brian - 05/11/2021


Exactly what I needed for a boat trailer. Quick delivery and easy install!

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Troubleshooting Backup Camera Wiring Where Power Wire is Good But Camera Still Does Not Work
    Sounds like the issue is the ground circuit for the backup camera you have on your RV. The power wire seems to be working just fine and connected properly so that would leave the ground as the most likely issue. Make sure the ground wire you are using for the camera is connected solidly and if that doesn't work try running a jumper wire from the wire to a metal portion of the trailer frame.
    view full answer...
  • What Happens if LED Light is Wired Backwards
    LED lights are diodes so if you were to wire them backwards on accident they just wouldn't light up. There would be no damage at all.
    view full answer...
  • Why Would Trailer Wiring Ground Circuit Get Hot
    If ground wire is getting hot it's shorting out to a 12 volt power source. I'd check to see where it's wired to see if it's either touching an open circuit or if it's ran straight to the frame you may have a circuit shorting to the trailer frame.
    view full answer...
  • Will the Miro-Flex, 2 Inch Round, LED Trailer Light, # MCL50RB, Fit an Enclosed Snowmobile Trailer
    If adding the Optronics light, # MCL50RB, you will need about 2 inches of space behind your existing light for it to fit. The reason is the Optronics light is deeper including the pigtail mounting surface and the pigtail, # A86PB. If you have at least 2 inches of clearance, then this light will fit in your existing 2 inch diameter hole with grommet # A54GB. Light # MCL55RB is not quite as deep at 1 inch overall, so that is another option for you.
    view full answer...
  • 2 inch and 4 inch Diameter Recess Mount LED Clearance Light Recommedation
    For the 2 inch light you would want the part # MCL55RB with the grommet part # A54GB and pigtail part # A46PB. For 4 inch we have the part # STL55RB. You would need the grommet part # A45GB and the same pigtail # A54GB. I wish we had a 3 inch option, but you may be able to enlarge the 3 inch holes to match the 4 inch ones.
    view full answer...
  • 2 and 4 Inch Diameter Trailer Lights, Grommets, and Harnesses
    I will be happy to help and give you some options. For 2 inch diameter red lights we have several options: # MC53RB (use grommet # A54GB and harness # A46PB) # MCL50RB (use grommet # A54GB and harness # A46PB) # MCL55RB (use grommet # A54GB and harness # A46PB) # MCL55R1224B (use grommet # A54GB and harness # A46PB) All in one option # MCL-50CRK # MCL155RB (use grommet # A54GB and harness # A46PB) For 2 inch diameter amber lights we also have several options: # MC53AB (use grommet #...
    view full answer...
  • Recessed Clearance Lights and Wiring For a Dump Trunk Bump Bed
    It sounds like you have three of the Optronics 2-1/2" LED Clearance Lights # MCL59RB held in place with the Rubber Grommet # A57GB and two of the Optronics 2" LED Trailer Clearance Lights # MCL55RB with the 2" Grommet # A54GB. If this is what you have all the lights use the 2-Wire Pigtail # A86PB and can be wired in using whatever length of wire is needed. We do have the Bonded 4 Wire # 16-4B-1 sold per foot that you can break into 2 wire strips for each side and connect using Butt Connectors...
    view full answer...
  • Tail Light Mounting Box For 6" Oval Tail Light and 2-1/2" Round Side Marker Light
    I have a couple options for you as we do not have a box like the Buyers Products Tail Light Mounting Box # 337LB383SL with a opening on the side for the Peterson LED Clearance and Side Marker Trailer Light # PE57PR. First would be to drill a 3" hole in the side of the Buyers Products Tail Light Mounting Box # 337LB384 to be able to use the Peterson LED Clearance and Side Marker Trailer Light # PE57PR. You will need the PVC Grommet # 142-18 for the side light. Otherwise you can use the...
    view full answer...

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Info for this part was:

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Expert Research:
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Updated by:
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