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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
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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. Lowest 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 800-298-1624 for expert service.
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  • Reviews (22)
  • Q & A (0)
  • Videos (2)
  • Photos
  • 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

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

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

Video Transcript for Optronics Trailer Lights - Clearance Lights - MCL-55RK Review

Today we're going to be taking a look at the Optronics LED trailer clearance or side marker light. The round trailer light features a sonically sealed design so it's got a water proof housing and lens unit that is submersible. LEDs are going to make great replacements for incandescent lights. They last longer. They burn brighter. They're more efficient and you don't have to worry about replacing bulbs and you don't have to worry about brittle filaments.

This light is going to feature a red lens, polycarbonite construction which is very strong and durable. It's a recessed mount with the included black grommet. The installation requires a 2 5/16" diameter hole at the desired mounting location and it's going to come with the industry standard 2 prong plug that provides your 2 wire design, so your ground wire and your power wire. The unit is Department of Transportation compliant. This is a P2 rated light. If we take a look at the dimensions real quick, just measuring the light.

That's going to be about 2". The grommet, outer edge to outer edge looks to be closer to 2 3/4". The depth not including the plug, we're looking at a depth of about 1". If we do include the plug, that's a 90 degree plug, we're looking at a little bit closer to an 1 1/2" more so, 1 3/8" right in that area. It's going to contain 3 LEDs so it's got a multi dial design. The power draw at 12.8 volts is 0.06 amps and Optronics puts lifetime warranty on the LEDs.

We're going to go and hook this up to our external power source. That way you can see what it looks like when powering to it. We'll also be able to turn off our overhead lights so you can see it in a low light setting. Here you can see the light sends out a really nice strong consistent signal. Again, 3 LEDs so the multi dial design helps optimize the light output.

This light's going to function as a clearance or side marker light. That's going to do it for today's look at the Optronics LED trailer light.

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   (22 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.

- MCL-55RK

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

- MCL-55RK

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

- MCL-55RK

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.

- MCL-55RK

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.

- MCL-55RK

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.

- MCL-55RK

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.

- MCL-55RK

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!

- MCL-55RK

Used these lights as side markers They work well

- MCL-55RK

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

- MCL-55RK

It's been a pretty good lamp.

- MCL-55RK

Worked great. Would order again.

- MCL-55RK

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

- MCL-55RK

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

- MCL-55RK

- MCL-55RK

Just what the doctored ordered.

- MCL-55RK

- MCL-55RK

- MCL-55RK

- MCL-55RK

- MCL-55RK

Thanks for the promptness, service was great

- MCL-55RK

Exactly what I ordered. Fast shipping.

- MCL-55RK


Ask the Experts 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 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...
  • 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...

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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 Cole B
Installed by:
Cole B
Employee Brent H
Installed by:
Brent H
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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