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LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - 3 Diodes - Black Base - Red Lens

LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - 3 Diodes - Black Base - Red Lens

Item # MCL32RBB
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4" x 2" Rectangle. Trailer light serves as either a side marker or clearance light when properly mounted. Built-in reflex reflector. Black ABS plastic base. Surface mount to trailer - hardware not included. 2-Wire pigtail. P2 rated. Lowest Prices for the best trailer lights from Optronics. LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - 3 Diodes - Black Base - Red Lens part number MCL32RBB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (50)
  • Q & A (8)
  • Videos (2)
  • Photos
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Optronics Trailer Lights - MCL32RBB

  • Clearance Lights
  • Rectangle
  • LED Light
  • Red
  • Surface Mount
  • 4L x 2W Inch
  • Non-Submersible Lights
  • Optronics
  • Rear Clearance
  • Side Marker

4" x 2" Rectangle. Trailer light serves as either a side marker or clearance light when properly mounted. Built-in reflex reflector. Black ABS plastic base. Surface mount to trailer - hardware not included. 2-Wire pigtail. P2 rated.


  • Rectangular LED trailer light functions as either a side marker light or clearance light
  • Built-in reflex reflector removes the need for a separate reflector
  • 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 black ABS plastic base
  • Snap-on acrylic lens is easily replaceable
  • Red lens over white LEDs
  • Compatible with 12V DC electrical systems
  • Mounts on surface of trailer - hardware not included
  • 2-Wire pigtail with power lead and ground wire
  • DOT compliant
  • P2 rated


  • Dimensions: 4" long x 2" tall x 1" deep
  • Distance between mounting holes (center on center): 3" apart on center
  • Diodes: 3
  • Power draw at 12.8V: 0.06 amps
  • Lifetime warranty on LEDs

Optronics MCL32 Series Red LED Marker Clearance Light Dimensions

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.

MCL32RBB Optronics LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - 3 Diodes - Black Base - Red Lens - P2 Rated

California residents: click here

Video of LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - 3 Diodes - Black Base - Red Lens

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 - MCL32RBB Review

Today we are going to be taking a look at part number MCL32RBB. This is the Optronics LED trailer clearance, side marker, or identification light. Now, again, it is the LED system. LED's are going to make great replacements for incandescent lights. They are going to last much longer, about 50 times longer. They are going to be much more efficient, so they are going to provide brighter light while using less power. You don't have to worry about replacing bulbs, and you don't have to worry about brittle filaments. This light is going to contain a nice red lens.

You can see that it has the reflex reflector built into the lens, so that's going to eliminate the need for a separate reflector. Here on the back side, we are going to have the black ABS plastic base. It's very strong and durable, it's got our mount holes back here as well, and it's going to have our two wire design. White wire is going to be for our ground connection, black wire is going to be for our power. The red lens is a snap on acrylic lens.

It's very easy to replace if needed. This is a surface mount installation, so it is designed to mount on the surface of your trailer. Your mounting hardware is not provided with this light. It is Department of Transportation compliant, an it is P2 rated. We're going to take a look at the overall dimensions, starting with the overall length. That's going to give us a measurement of about four inches. The overall width from edge to edge is about two inches.

The overall depth, measuring from back to front, is only going to have a depth of about one inch. That's how far it is going to stick out from the mounting surface of the trailer. Our mount holes are going to be separated on center, apart from one another about three inches. This is an LED system. It's going to contain three diodes. It's got the multi-diode design, which when we hook it up to power, you're going to be able to see that it really does optimize our light output. The power draw, at 12.8 volts is 0.2 amps, and Optronics is going to put a lifetime warranty on the LED's. Lets go ahead and hook it up to our actual power source.

Then we can also turn off our overhead lights, that way you can see what it looks like in a low light setting. Again, you can see here it contains three diodes, or three LED's. It sends out a nice clear, consistent signal. The red lens allows a lot of light to come through. You can see how that reflex reflector kind of takes effect. It has that shine to it. Again, that is simply going to eliminate the need for a separate reflector. That's going to do it for today's review of part number MCL32RBB. This is the LED trailer clearance side marker identification light from Optronics.

Customer Reviews

LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - 3 Diodes - Black Base - Red Lens - MCL32RBB

Average Customer Rating:  4.8 out of 5 stars   (50 Customer Reviews)

4" x 2" Rectangle. Trailer light serves as either a side marker or clearance light when properly mounted. Built-in reflex reflector. Black ABS plastic base. Surface mount to trailer - hardware not included. 2-Wire pigtail. P2 rated.


Lights were direct replacement for my camper so they bolted right up a were much brighter. 629354


Completed LED conversion. Sharing my completed project with you. 476015


I replaced all the clearance lights and taillights on our fifth wheel camper with these OE style LED versions. They are much brighter and therefore much safer, especially in the case of the tail/brake/turn lights seen elsewhere at etrailer. They should last a lot longer than the original bulb units. I also like the way they look as compared to the old bulb style. Our camper was only a year old, and I don't understand why they all wouldn't come from the factory with LEDs. I installed them all myself without issue. 332749

Thank you for your follow up. I am still happy with my purchase,although they are installed on a fifth wheel camper trailer that doesnt getused a lot and usually in the daylight hours, so the lights havent got alot of hours on them. So far, so good. Thanks again.
Grant N - 01/22/2018



Replaced taillight with LED so decided to change running lights as well! 738057


Items were delivered in a timely manner even without expedited shipping. Items were as described and are a perfect replacement for the current incandescent clearance markers on my RV. I've done business with etrailer multiple times and they have yet to let me down. Highly recommended. 713227


The lens on these fit the lens that had popped off one of my lights so I didn't have to replace the whole assembly. 682209


the price this unit is more then the amber units by almost 2 bucks for the same unit style 632068


Low power led with good night time visibility. Added 1 of these to each side of cargo box for better side visibility behind the vehicle. Even when light is not on, the built in reflector still provides a measure of added safety which works much better than safety tape which kept peeling off at highway speed. 628728


Good light bright enough for day time use as well, they always work and that is what matters to me. 629512


I’m very happy with these LED tail lights. Bought them to replace the ones that came on the trailer. They are bright and seem to be of high quality. They were easy to install. The only slight drawback is that it’s a bit tricky to get the wires to lay flat enough against the light to get it to sit flush with the back of the trailer. But in the end it worked fine. I would recommend these as a good replacement for older, smaller, incandescent tail lights. 612713


Good price with fast. Deivery. 604252


Nice lights 590213


Exactly what I needed. Thank you 581228


The light worked great. Then hurricane Irma totalled my R/V. The insurance company owns it now. 571025


It was what I order and got it quick. Thats the way it is supposed to work. 554583


Exactly as described online, fits the trailer perfectly. 512408


The product was better than expected. Excellent marker light 509547


As advertised 489908


Changed my incandescent clearance lights with these LED type. They look great, exact fit = easy swap out. fast service. 474005


Product was exactly what was described. The order was shipped the same day that I ordered the part and received in the mail within a couple of days. Extremely happy with etrailer and will order from them again. 468724


Great Product! With the helpful video tips I was able to replace my broken marker light with the new one with no problems. The black base worked out great, it blended right in with the body color of the motorhome. 457098


Product arrived as expected and on time. I'm disappointed that the 7 clearance lights ordered - came without screws for mounting. 452098


Good price, prompt delivery. I will use again. 451592


Good OEM and aftermarket replacements that fit like originals. 450863


Replaced original equipment light that had an argument with a fence. Same look, except for LED. quick shipping. 442981

Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Red LED Version of the Clearance Light MCL32ABB
    The red LED version of the part # MCL32ABB that you referenced is the part # MCL32RBB. This is an exact match minus the lens color.
    view full answer...
  • Recommended LED Marker Lights for Trailer Over 80 Inches Wide
    The Trailer Clearance or Side Marker Light w/ Reflex Reflector - LED - 3 Diodes - Red Lens - Black Base # MCL32RBB will have the room to hide wires. The amber lens # MC32ABB is an incandescent bulb. I believe you will want the Oval LED Trailer Clearance, Side Marker Light with Reflector, 6 Diode - Amber # MCL31AB along with the Oval LED Trailer Clearance, Side Marker Light with Reflector, 6 Diode - Red # MCL31RB. For the light bar, I recommend the Sealed, 3-Light Truck, Trailer...
    view full answer...
  • Recommended 2 Wire LED Marker Lights for 2015 Four Winds Siesta RV
    For your 2015 Four Winds Siesta RV, I recommend the Rectangular LED Trailer Clearance and Side Marker Light with Reflex Reflector- Amber # MCL32ABB and Red # MCL32RBB. These are both 2 wire LED lights that will allow you to add marker lights to your current system without issue. You can simply splice these into your current wiring to add the additional lights you desire. For connection, I recommend # 16-1-1 wire and heat shrink butt connectors # DW05744-10.
    view full answer...
  • Is There a Replacement Lens for Optronics Trailer Clearance Light MC48RB
    The Optronics Trailer Clearance or Side Marker Light # MC48RB does not have a replacement red lens; if you have this light and the lens was damaged you will need to replace the entire unit. This is an incandescent light and I recommend upgrading to an LED if you do need to replace the light because LED lights are brighter, last longer and will not draw as much power as their incandescent counterparts. The Optronics LED Trailer Clearance or Side Marker Light # MCL32RBB is a great...
    view full answer...
  • Version of Clearance Light MC32RB with Black Base
    Yes, for a version of the # MC32RB that has a black base you would want the part # MCL32RBB instead.
    view full answer...
  • Easy to Install Wiring Harness on 2004 Jeep Liberty
    Since your 2004 Jeep Liberty does not seem to have the factory 7-way, the easiest to install 4-way that fits your Jeep is the Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 42475. You'll only need to plug this into your Jeep's harness, and getting to that is likely going to be the most difficult part as you'll have to remove some interior paneling to find it. Then for lights, I recommend going with LED marker lights. Ten marker lights is quite a bit...
    view full answer...
  • Replacement LED-Type Rectangular Red Clearance Light for 2001 Newmar RV
    Based on my research the Hamsar 99063 is an LED-type clearance/marker light with a red lens that is roughly rectangular in shape. We do not carry this brand but we do have an extensive range of trailer lighting that meets these same general characteristics, LED operation, rectangular with a red lens. All are shown on the linked page. These include items such as # MCL32RBB and # MCL44RB1. These do not exactly match your specified dimensions but they are close.
    view full answer...
  • Version of the Clearance Light MCR32RB that has a Black Base
    Sounds like you are looking for the part # MCL32RBB. It is an LED, black-based version of the light you mentioned.
    view full answer...

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Info for this part was:

Expert Research:
Jameson C
Expert Research:
Adam R
Installed by:
Cole B
Installed by:
Randy B
Written by:
Amy B
Video Edited:
Chris R
Updated by:
Sarah W
Updated by:
Brian T
Video by:
Zach D

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