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LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens - 12V/24V

LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens - 12V/24V

Item # MCL55R1224B
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MCL55R1224B - Submersible Lights Optronics Trailer Lights
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In Use/Installed

2" Diameter round. Waterproof, LED trailer light serves as either a side marker light or clearance light. Durable polycarbonate housing and lens. Recessed mount with grommet (not included). Accepts standard 2-prong plug. P2 rated. Lowest Prices for the best trailer lights from Optronics. LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens - 12V/24V part number MCL55R1224B can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (10)
  • Q & A (7)
  • Videos (2)
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Optronics Trailer Lights - MCL55R1224B

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

2" Diameter round. Waterproof, LED trailer light serves as either a side marker light or clearance light. Durable polycarbonate housing and lens. Recessed mount with grommet (not included). Accepts standard 2-prong plug. P2 rated.


  • LED trailer light functions as a clearance or side marker light 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 and 24V DC systems
  • Recessed mount 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" deep
  • Diodes: 3
  • Power draw at 12.8V: 0.06 amps
  • Lifetime warranty on LEDs

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.

MCL55R1224B Optronics 12V/24V LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens - P2 Rated

California residents: click here

Video of LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens - 12V/24V

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Optronics LED Trailer Clearance Side Marker Light Installation

Today on our equipment trailer we're going to be installing the Optronics LED Trailer Clearance and Side Marker Light with four diodes designed for a 12V to 24V system in the red color, part number MCL55R1224B. While on our trailer today we're going to be reusing the rubber grommet that holds the light in place, as well as the pigtail that connects the light to the wiring system on the trailer, we'll go ahead and give you those two part numbers in case if you need to replace them or maybe you just don't have them and you're adding some new lights. The 2" grommet required to install this light is a flush mount design with an open back. That's part number A54GB. The wiring pigtail to install this light is a two wire pigtail for sealed trailer clearance and side marker lights. That's part number A46PB. Before we remove the old light which is an incandescent style bulb, let's go ahead and show you what it looks like. Now while the incandescent light does work just fine the new LED light will give you longer life and you don't have to worry about the bulb burning out over time. Now let's go ahead and show you how to install the new LED bulb and then we'll go ahead and turn the lights back on so you can see a comparison between the two. Here's what our new Optronics light looks like, you'll see it's the same size.

This has, as you can see, there's four LED diodes in it. In order to remove the old light, you can sometimes slip just a screwdriver in along side and kind of work it out of the rubber grommet. Depending on how your trailer is wired you may or may not have much lead on the back side of the light. On this particular trailer there's not much at all. We'll go ahead and work the plug off, just like that.

Now is a good time that you want to go ahead and even remove the rubber grommet and clean it out of any dirt and debris that may be in it. We're going to take a paper towel and clean it out some. We'll also wipe our connector off here. Make sure we get the two prongs cleaned off. With our grommet cleaned up we can go ahead and reinstall that, it simply slides into place and catches on that little lip that's part of it right there. We'll then remove the cover here on the back side of our light.

You notice inside the two connectors on the light. There's a little bit of dielectric grease that's already been installed; this will help keep these from corroding up over time. Next we'll take our pigtail here, plug it back into the back side of the taillight. Now with our connector plugged into the back side of the light, just go ahead and reinstall the light into the rubber grommet. With our light back in place let's go ahead and turn it on so you can see the difference between this new LED light and the old incandescent bulb. You can see with our new LED light turned on how much brighter it is over the incandescent bulb. That'll do it for the installation of the Optronics LED Trailer Clearance and Side Marker Light in the red color, part number MCL55R1224B, as installed on our equipment trailer.


Customer Reviews

LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Round - Red Lens - 12V/24V - MCL55R1224B

Average Customer Rating:  4.7 out of 5 stars   (10 Customer Reviews)

2" Diameter round. Waterproof, LED trailer light serves as either a side marker light or clearance light. Durable polycarbonate housing and lens. Recessed mount with grommet (not included). Accepts standard 2-prong plug. P2 rated.

- MCL55R1224B

Happy with my product. Put in a large order and then recieve an email that there was a mix up in their invantory and one light wont be shipped for another month. Common mistake but still a pain. 168708

- MCL55R1224B

Tires and LED tail lights shipped in a timely manner. Tires are round and black and the red LED lights light up red in color. 152592

- MCL55R1224B

look good, but have to return, my trailer needs 2 1/2" not 2" 470010

Nick, If you need a 2-1/2 clearance light I would recommend part # MCL157RB
GloLight LED Trailer Clearance or Side Marker Light - Submersible - 9 Diodes - Round - Red Lens
. It is 2-1/2 in diameter and is 1-3/16 deep. It is also a LED light.
-- Heather A - 01/26/2018


- MCL55R1224B

Perfect replacement, just like the dr ordered. They were ordered to replace side markers on enclosed motorcycle trailer. Discription of lights was spot on as usual. Great company, as I have ordered from before and always have got what I needed and received items within time given by etrailer. Great company to deal with. 405395

Just great. No problems with great service and quality products.
Big D - 07/13/2018


- MCL55R1224B

Ordered multiple LED trailer lights. As usual, etrailer had what I needed and shipped on time. 385173

- MCL55R1224B

Great product, great fit for our applic ation. 334053

- MCL55R1224B

Quick ship .. Easy install .. Look great! Thank you 305265

- MCL55R1224B

Hi George , The lights that you sent me work great,thanks for the great service. 262836

- MCL55R1224B

The lights work very well, and the price was fair. 248672

- MCL55R1224B

Name brand product,fits perfect and works great. 210678


Ask the Experts about this Optronics Trailer Lights

  • 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...
  • Replacement LED Light Recommendations For Trailer
    For a grommet mount red 2 inch clearance light I recommend part # MCL55R1224B. This light uses a 2-wire pigtail, part # A46PB for installation. If you need amber, you would order part # MCL55A1224B. Installed without a grommet, these lights measure 2 inches diameter x 1 inch deep. You can use the 2 inch grommet part # A54GB for this light for a flush mount. It would require a 2-5/16 inch mounting hole. The tail lights I recommend are the Optronics GLOLight LED Stop/Turn/Tail Light,...
    view full answer...
  • 2 inch 24 Volt LED Trailer Clearance Light Recommendation
    The LED Trailer Clearance/Side Marker Light # MCL55R1224B that you referenced can be powered by 24 volts. This light does not use the weather pack connectors you referenced, but a similar style of pigtail connector part # A46PB is what is used. For a grommet you would then also need the # A54GB.
    view full answer...
  • Tail Lights and Clearance Lights that Can be Used on Both a 12 Volt System and 24 Volt System
    For a tail light that can run off of 12 volt or 24 volt systems you can use Transit tail light # STL90R24B. For clearance lights you can use # MCL55A1224B for an amber light that works with 12 and 24 volt systems or # MCL55R1224B for a red light. For these lights use pigtail # A46PB and grommet # A54GB. Or for surface mount clearance/marker lights that are 12-24 volt compatible you can use # MCL66A24B for amber and # MCL66R24B for red.
    view full answer...
  • 24 Volt Trailer Light Availability
    The Light Assembly part # TLL28RK that you referenced is only compatible with 12 volt circuits. We have a couple trailer lights that are compatible with 24 volt circuits though. Check out the part # STL23R24B, # STL90R24B, # MCL55R1224B, or # SLL43AB2.
    view full answer...
  • Availability of 2" and 4" Round Trailer Lights That Work with 12V and 24V Systems
    For a 4" round LED trailer light the closest option we have available that is compatible with 12V and 24V systems is the Peterson LumenX LED # M826R-9, which features a 4-1/4" diameter. The LED light assembly has 9 diodes for a bright light output and is made here in the USA. Then for a 2-1/2" red assembly the closest option we have is the Optronics LED # MCL55R1224B that has a diameter of right at 2". This is designed for 12V or 24V DC systems and is completely waterproof due to its...
    view full answer...
  • Are There 24 Volt Red and Amber Trailer Clearance Lights
    There are round clearance lights (marker lights) that are 24 volt compatible, but the closest in diameter we have to what you are looking for is 2 inch diameter lights: - LED Trailer Clearance or Side Marker Light - Red Lens # MCL55R1224B - LED Trailer Clearance or Side Marker Light - Amber Lens # MCL55A1224B - 2" Round Grommet - Flush Mount # A54GB - Right Angle 2-Wire Pigtail # A46PB Those are flush-mounted lights but there are also 24 volt surface-mounted lights: - Optronics...
    view full answer...

Do you have a question about this Trailer Light?

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Info for this part was:

Written by:
DeAnne T
Expert Research:
Jameson C
Installed by:
Cole B
Updated by:
Sarah W
Updated by:
Brian T

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