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LED Trailer Clearance or Side Marker Light w/ Grommet and Pigtail - Submersible - 3 Diodes - Red

LED Trailer Clearance or Side Marker Light w/ Grommet and Pigtail - Submersible - 3 Diodes - Red

Item # MCL-55RK
Our Price: $21.56
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Shipping Weight: 0.18 lbs
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2" Diameter round. Waterproof trailer light serves as either a side marker light or a clearance light. Recessed mount with included black grommet and 2-wire pigtail. Red polycarbonate lens. P2 rated. Great Prices for the best trailer lights from Optronics. LED Trailer Clearance or Side Marker Light w/ Grommet and Pigtail - Submersible - 3 Diodes - Red part number MCL-55RK can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (24)
  • Q & A (0)
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  • Why etrailer?

Optronics Trailer Lights - MCL-55RK

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

2" Diameter round. Waterproof trailer light serves as either a side marker light or a clearance light. Recessed mount with included black grommet and 2-wire pigtail. Red polycarbonate lens. P2 rated.


  • Round trailer light serves as either a side marker light or a clearance light
  • 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
  • Red lens
  • Polycarbonate lens and housing
  • Recessed mount with included black grommet
    • Installation requires a 2-5/16" hole at desired location
  • Includes industry-standard 2-prong PL-10 plug with 6" pigtail
  • DOT compliant
  • P2 rated


  • Light dimensions: 2" diameter x 1" deep
  • Diodes: 3
  • Power draw at 12.8 volts: 0.06 amps
  • Lifetime warranty on LEDs

Optronics 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 or P3-Rated Lights

Diagram of light spread for P2 rated light

A P2-rated or P3-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.

MCL55RK Optronics Flush-Mount LED Side Marker/Clearance Trailer Taillight - P2 Rated - Red Lens

California residents: click here

Customer Satisfaction Score:

Customer Reviews

LED Trailer Clearance or Side Marker Light w/ Grommet and Pigtail - Submersible - 3 Diodes - Red - MCL-55RK

Average Customer Rating:  4.9 out of 5 stars   (24 Customer Reviews)

2" Diameter round. Waterproof trailer light serves as either a side marker light or a clearance light. Recessed mount with included black grommet and 2-wire pigtail. Red polycarbonate lens. P2 rated.


This is an excellent fit for my trailer and it's easy to wire and they arrived 2 days earlier that scheduled.

Great. They look like the factory trailer lights
Al r - 11/16/2021


The light grommets and electrical connectors work great. etrailer, packs and ships,
whatever I have ordered, with care and I have not ever received a damaged item.

etailer does an excellent job and I look to them first for my trailer and truck parts and accessories.


Replaced all the incandescent bulbs on my trailer with LEDs. These fixtures fit the hole that the old ones came out of and the existing two prong connectors fit as designed to the new fixtures. Was a simple process to pop out the old lights and install the new ones.
Happy with the performance and look of the new LED fixtures, also the lower load on the electrical system of the tow vehicle.


Great quality products that arrived really fast. The videos attached made hooking up the lights a breeze. I saved approx 50% compared to our local trailer shop.

Everything is working perfectly. I have used this trailer every weekend this year. Lots of mud and water. No issues at all. Im proud when I see my trailers lights so much brighter than other guys trailers. Happy Canadian here!!
Steve T - 11/01/2017


Ordered item was received in excellent condition. The LED Trailer side marker light fit perfectly in the steel light guard . That I ordered several weeks ago. Then this spring I'll install tail light guard on boat trailer.


Everything arrived safe and sound and the order was all there. Like usual quick shipping. Just finished hooking up all the lights. I love etrailer and would highly recommend using them for all your trailer and truck needs. Keep up the good work.


all of the items I ordered are Just what I needed for a complete rewire of my flatbed trailer. and I was blown away by how fast it arrived. it's too bad more of America's businesses aren't operated like etrailer!


Used these lights as side markers
work well


Once again great service and a quality part that fit just as expected!


It's been a pretty good lamp.


Worked great.
Would order again.



Product was as advertised. Shipping was swift and notifications were timely. Very impressed!


All items showed up in good condition and on time. I will be making more purchases in the near future.


Just what the doctored ordered.



Thanks for the promptness, service was great



Exactly what I ordered. Fast shipping.







See what our Experts say about this Optronics Trailer Lights

  • Size Hole Needed to Install LED Trailer Clearance # MCL-55RK
    The size hole you have to drill to install the part # MCL-55RK that you referenced is 2-5/16 inches. I attached a review video for this light for you to check out as well.
    view full answer...
  • Replacement LED Trailer Clearance Light for 2001 Floe Versa Max Snowmobile Trailer
    I pulled up some pictures of your 2001 Floe Versa Max Snowmobile trailer and it looks like the clearance lights are 2-1/2 inch diameter grommet mounted lights like the: -Optronics LED Clearance Light part # MCL59RB I wasn't able to verify the size though so you might measure yours to be sure. We also have 2 inch LED light kits like the part # MCL-55RK but I am pretty sure what you have is larger than that.
    view full answer...
  • Replacement Back Up Lights For a Motorhome With 2" Diameter Recessed Lights For Backing Up
    While we do have The Optronics MCL-55 lights with a clear lens like # MCL55RCB they will have red or amber LED lights inside so they would not work for a back up light for your motorhome. The lenses are also not replaceable if they become damaged as they are sealed to the light assembly. The LED Backup Light # BUL06CFB is currently one of the smallest LED lights that we have that is a backup light. The light will fit a 4-1/2" opening on the back of the motorhome.
    view full answer...
  • Availability of 2 inch Clearance Light that is Submersible that Installs with Grommet
    The LED Trailer Clearance or Side Marker Light w/ Grommet and Pigtail # OPT97WR is an amber version of the light you are looking for as it is submersible, 2 inch in diameter, and installs with a grommet. The red version of this is # MCL-55RK. There isn't a version that doesn't use a 2 pin connector that attaches to the back of it.
    view full answer...
  • Can You Go From a 2" Round Trailer Clearance Light to a 3/4" or 1"
    I do have an option for you but we don't offer any adapters to go from a 2" round trailer clearance light to a 3/4" or 1" round trailer clearance light. Therefore, your best option for replacement is the LED Trailer Clearance or Side Marker Light part # OPT97WR or amber or part # MCL-55RK for red. These lights both required a 2-5/16" hole for installation. The only option for a smaller light would be to weld-in new material for the smaller light to attach but I don't think you'd want to...
    view full answer...
  • Where to Find 2" Trailer Clearance Lights
    All of our clearance lights have their own wiring so you'll need to do some splicing on your end to get all of the lights to properly function. If you're needing red 2" clearance lights you can use the part # MCL-55RK you were looking at but if you need amber (orange) 2" clearance lights you can use the part # OPT97WR instead. To splice your wiring together you can use heat shrink butt connectors like the kit # DW05743-5 to help give you the most secure and protected connections. Attached...
    view full answer...

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Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video Edited:
Joshua S
Employee Chris R
Video Edited:
Chris R
Employee Dustin K
Video by:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee Brent H
Installed by:
Brent H
Employee Bradley B
Installed by:
Bradley B
Employee Amy B
Written by:
Amy B
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Noah M
Updated by:
Noah M

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