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Optronics LED Trailer Clearance and Side Marker Light w/ Reflex Reflector - 6 Diodes - Amber Lens

Optronics LED Trailer Clearance and Side Marker Light w/ Reflex Reflector - 6 Diodes - Amber Lens

Item # MCL44AB1
Our Price: $11.72
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Shipping Weight: 0.09 lbs
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4" x 1-1/2" Rectangle. LED trailer light functions as a clearance or side marker light. Built-in reflex reflector. Durable ABS housing. Surface mount - hardware not included. 1-Wire design ground through hardware. P2 rated. Great Prices for the best trailer lights from Optronics. Optronics LED Trailer Clearance and Side Marker Light w/ Reflex Reflector - 6 Diodes - Amber Lens part number MCL44AB1 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (132)
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Optronics Trailer Lights - MCL44AB1

  • Clearance Lights
  • Rectangle
  • LED Light
  • Amber
  • 4L x 1-1/2W Inch
  • Surface Mount
  • Rear Clearance
  • Side Marker
  • Non-Submersible Lights
  • Optronics

4" x 1-1/2" Rectangle. LED trailer light functions as a clearance or side marker light. Built-in reflex reflector. Durable ABS housing. Surface mount - hardware not included. 1-Wire design ground through hardware. P2 rated.


  • Rectangular LED trailer light functions as both a clearance light and a side marker when properly mounted
  • 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
  • Amber lens over white LEDs
  • Durable ABS housing and acrylic lens
  • Compatible with 12V electrical systems
  • Surface mounts on trailer - hardware not included
  • 1-Wire design grounds through mounting hardware
  • P2 rated


  • Dimensions: 4" long x 1-1/2" tall x 15/16" thick
  • Distance between mounting holes (center on center): 3"
  • Diodes: 6
  • Power draw at 12.8V: 0.040 amps
  • LIfetime warranty on LEDs

Optronics MCL44 Series LED Side Marker Clearance Light Diagram

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.

MCL44AB1 Optronics Fleet Count LED Trailer Clearance and Side Marker Light w/ Reflex Reflector - 6 LEDs - 1-Wire - Amber Lens

Alternate part number: MCL-44AB1

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Customer Reviews

Optronics LED Trailer Clearance and Side Marker Light w/ Reflex Reflector - 6 Diodes - Amber Lens - MCL44AB1

Average Customer Rating:  4.8 out of 5 stars   (132 Customer Reviews)

4" x 1-1/2" Rectangle. LED trailer light functions as a clearance or side marker light. Built-in reflex reflector. Durable ABS housing. Surface mount - hardware not included. 1-Wire design ground through hardware. P2 rated.


I have some pictures for you to share at etrailer so you can see where all of my lights went to. Just to let you know and at the present time I'm working up another order for another 8 lights and that will be a total of 56 lights that I have put on the truck. Thanks for the great service.


Wanted to convert over to LED lights. Easy to install. Works great so far.



The are working great and are bright at night. I bought two more lights just like them to add to my trailer


This company is top notch they have what i need for any of my trailers and ship it out immediately. Couldnt ask for a better company.


Clearance/side marker lights were exactly what I needed at a reasonable price!! Thank y’all


I bought both this and the red colored lights.

is very easy to install. It serves its purpose by being bright enough as a marker/clearance light without being obnoxiously bright.

My only negative comment is the packaging. I bought 4 lights and it was packaged with a crumpled packaging paper on the bottom of the box and all 4 lights was just placed on top of it. I think the lights should have been individually wrapped as there were some light scratches on all the lights when I opened the box. Not really a concern of mine as nobody will ever see the scratch unless looked on very, very closely, but people with major OCD might not like it at all.



Still works.. Only thing I forgot to mention in my 1st review. The entire light assembly is not sealed. The led circuit board is sealed with some sort of hot glueclear silicone but not the whole assembly. I decided to seal the entire assembly with clear silicone can be bought at any hardware store to prevent the inside of the reflector housing from becoming discolored.


These 1 wire self-grounding lights from Optronics are exactly what I was needed to match up with original lights on my enclosed car trailer. These lights were a breeze to install, the led's are bright and I am very happy with this product and Etrailer !!!!



The lights are still going strong and doing perfectly fine !!


Extremely pleased with the quality of the part and the condition and timeliness of the delivery. Thank you etrailer for a job well done!


How to order marker tail light lenses for my trailer. When they arrived I discovered I had ordered the wrong one I called and they were very helpful in returning them. And help me find the right ones. Received them in a timely matter. They were the right size and easy to install.



They were a perfect Nice and bright I have not had any problems with them


Outstanding product. Very easy to mount. No more worries if my trailer lights are going to light at the beginning of Spring. No more stocking up of light bulbs. Now hook up and roll.





These were very easy to install. They look great lit up. Lots of clear, obvious light. They have been very reliable. Good product!

I think, if I remember correctly, that I popped the lens off and pulled out the ground wire and made a ground connection back to the ground circuit inside my trailer. It was a few extra steps but I never have to worry about a direct ground to the trailer going bad (which plagued my old trailer light setup).


I bought these to replace the incandescent lights that were on my trailer. It matched my old ones perfectly maybe they were the same company i am not too sure. These are bright at night the color is crisp compared to the old lights. The lens has no rubber seal nor is it one whole piece. The leds themselves are covered in some sort of clear epoxy to make it waterproof. There are 6 leds in the middle i wish they had some pointing to the side so it gives a brighter glow but this style is not bad. Good thing about leds is the long life they have so there is one less thing to worry about. Especially towing late night to the race track the people behind me can see me a good distance away with how bright these are compared to the old lights.


Overall a nice product; however, one was DOA (etrailer customer service took care of that easily); lens is easy to crack so be super careful when opening it to install. They aren't as bright as some I've seen on Amazon for a lower price but wasn't sure of the quality. I can count on to stand behind their product.


The lights arrived and the installation was very easy, most of the lights i ordered we're plug and play. The LED lights make a big difference on seeing the trailer at night


Placed my order on a Sunday when I discovered I had a few marker lights not working on the trailer. We were to leave on the following Friday for a trip to Colorado from Georgia so I had a 2 day rush shipment. I was very surprised when I got an email later that day that said my lights had been packaged and shipped and had the tracking number. I received the parts on Tuesday 2 days later just as expected. Very pleased with the parts and the transaction. Highly recommend E Trailer!


Good fit, east install. This is a good quality light. Finally, after 15 years of owning this trailer, ALL my clearance lights WORK! LED's provide good visibility and should last much longer than incandescent bulbs.


Change over from regular lighting system to LED pretty simple. Note, make sure you order the correct wiring system (1 or 2 wire). The 1 wire system can be utilized but will need some adjustments.
Front facing markers are so bright you may find it blinding especially when backing up at night.


Excellent, LEDS and wiring are sealed from moisture, wire can be pulled back and terminated inside the lens cover, the cover is replaceable. We elected to replace all the lighting in/on our 1987 NOMAD RV trailer with LED.


I only used the lens to replace the one missing on my RV. It was a good fit. The entire light assembly looked like a real nice product.


Nice looking light, installation holes on light where exactly as my old ones which made very easy . would like to have seen a weatherproof gasket. Made my own using doublesided tape


Exact replacement for the incandescent lights that came on my diamond cargo trailer except better, LED quality is great and the ease of changing to led is even better. Fast shipping and awesome selection!


product seems well made. the ground wire connector is small had to replace with a larger one. otherwise just what I wanted on my trailer build. bright.


Exact replacement bulbs for the clearance lights on my horse trailer, speedy delivery even tho I chose the standard shipping.


Everything arrived in perfect order and exactly as I was hoping for. I will get these parts installed on our horse trailer soon and will attach pictures once completed. I also will be ordering a few more items for my new pop up once I get it home and see exactly what it needs. Looking forward to fixing that up as well.


Easy swap, works exactly like the original. I only wish it came with the original rubberized seal to prevent water infiltration.


Great customer service , LED lights are a great , inexpensive upgrade. Well worth it !

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Can Single Wire Clearance Light Be installed To Replace 2-Wire Light On Travel Trailer
    If a trailer clearance light like part # MCL44AB1 is used, the one wire is the power wire for the light and the light will be grounded through the mounting hardware. If you want to use the ground wire that you have on your trailer you can install part # MCL44AB. This has a 2-wire install, where one is for the power and the second wire is for the ground.
    view full answer...
  • How Do I Wire A 2 Wire Light In Place Of A Single Wire Light On My Camper?
    The lighting on your 1987 camper van used a single power wire input and would ground the lamp through the lights mounting bracket. This is how the Optronics LED Trailer Clearance and Side Marker Light # MCL44AB1 would connect. The Optronics LED Trailer Clearance and Side Marker Light # MCL44AB uses a 2 wire connection similar to the wiring on your new lights. You will attach the red power input wire on your new lights to the red wire on your camper van. The white wire will need to be...
    view full answer...
  • Installing Optronics LED Trailer Clearance Lights # MCL44RB
    The Optronics LED Trailer Clearance Lights # MCL44RB that you will be installing on your trailer features a power and ground wire. The black wire coming from the assembly is for power and the white wire is for ground, which will just need to be attached to a clean, bare metal surface on the trailer. It's possible that the two black wires coming from your existing/old assemblies could be used for either ground or power, but I can't be sure of this. When installing the new assemblies all...
    view full answer...
  • Can Power Wire of the Rectangular LED Trailer Clearance Light be Routed Through Angled Base Hole
    If you wanted to route the power wire of the # MCL44AB1 through the angled hole on the back of the base of the light you certainly could, but you are going to have to slightly enlarge the hole as the wire will be just barely too thick.
    view full answer...
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  • Is the Wiring Accessible Behind the Lens of Optronics Clearance light # MCL22AB1
    On trailer light # MCL44AB1, beneath the lens where the power wire attaches to the circuitry is sealed. What you would need to do is push the power wire in through the hole in the back, make the cuts and splices needed and push it back through the hole. I made a short video showing you the inside of the light. The same thing applies to the red version of this light.
    view full answer...
  • Wiring Single Wire Trailer Clearance Lights
    The single wire clearance lights like # MCL44AB1 will be grounded through the mounting. You can either mount these to the frame of the trailer or structural components connected to the frame of the trailer. The siding or skin of the trailer is not likely to be a good enough ground. You can run a common ground wire to the series of lights used if there is not a good connection between them. I've attached some videos and articles to assist.
    view full answer...
  • Difference Between 1 and 2 Wire Trailer Clearance Lights
    If where you plan to mount the clearance lights is metal that touches the trailer frame then a 1 wire clearance light would work just fine. The difference between the 1 wire and 2 wire lights is that the 1 wire lights ground through their mounting hardware and the 2 wire lights have to be run to a metal surface of the trailer that touches the frame or to the main ground of the trailer.
    view full answer...
  • Replacement Single Wire Trailer Lights that Measure 4 by 1-1/4 Inches
    We have a couple of lights that are just like that. We have a red clearance light, # MCL44RB1, and an amber clearance light, # MCL44AB1. Both are single wire LED lights that measure 4 by 1-1/4 by 15/16 inches.
    view full answer...
  • Red Version of Amber Clearance Light # MCL44AB1
    Yes, we have the red version of the # MCL44AB1 as part # MCL44RB1.
    view full answer...
  • Availability of Incandescent Version of Optronics # MCL44AB1 LED Trailer Clearance/Side Marker Lamp
    The incandescent version of the # MCL44AB1 lamp you mentioned is part # MC44AB. The lamp measures 4 by 1-1/2 inches and mounts on 3 inch centers. The lamp is a two wire design, one wire for power, the other for ground. This differs a bit from the LED version that grounds through its mounting hardware.
    view full answer...
  • Troubleshooting Single Wire Trailer Marker Lights Only Running On Turn Signals and Brake Lights
    It sounds like you have some marker lights like the Optronics # MCL44AB1 which was only designed to activate when the running lights are switched on. If you also want the lights to illuminate with turn signals and brakes you would want the Peterson # M353A which has 3 wires. One ground and one for running lights and the 3rd wire for the turn/brake light. The single wire light you have uses the mounting hardware to ground to the trailer chassis. This would be connected to the running lights...
    view full answer...
  • Recommended LED Trailer Lights In Amber
    It looks like you need the Rectangular LED Trailer Clearance, Side Marker Light with Reflector, 2 Wire, 6 Diode - Amber # MCL44AB, # MCL44AB1, or something similar like the Bargman LED Clearance/Side Marker Light - 59 Series - Amber - White Base # 47-59-002. The only way to tell the correct fit is if you have the dimensions you want and then to see what is available. I've linked the page to all your Amber LED options to assist but I'm happy to assist if you have those dimensions. The...
    view full answer...
    Image 1 for
  • Replacement Red and Amber Lenses for MC44 Series and BA44 Series Trailer Lights
    For just the replacement lens for the Optronics LED Trailer Clearance or Side Marker Light Red Lens item # MCL44RB1 you will want the Replacement Red Lens for MC44 Series and BA44 Series Trailer Lights item # A44RB. For just the replacement lens for the Optronics LED Trailer Clearance and Side Marker Light item # MCL44AB1 you will want the Replacement Amber Lens for MC44 Series and BA44 Series Trailer Lights item # A44AB.
    view full answer...
  • Recommendation for Sealed Clearance Lights to Replace Corroded Assemblies on Trailer
    To replace your existing Optronics # MCL44RB and # MCL44AB1 Clearance Lights with sealed alternatives, I recommend taking a look at the Optronics Sealed LED Trailer Clearance Light - Amber # MCL49AB and Red # MCL49RB. These feature a bit of a different shape than the standard rectangle of your existing assemblies, but they do have very similar dimensions, along with the same 3 inch mounting hole measurement. The lights themselves measure 3-7/8 inches long, 2 inches wide, and 1 inch deep....
    view full answer...
    Image 1 for Image 2 for
  • Replacing 2 Wire Marker Lights With Single Wire Marker Lights
    On lights similar to the Optronics LED Trailer Clearance and Side Marker Light # MCL44AB1 that will only have 1 wire pigtail this is the positive power wire. The light requires mounting to a grounded metal surface that will provide you the ground connection. If you are not able to attach it to a grounded metal surface you can also use a jumper Wire # DW02359-1 with a Ring Terminal # DW05737-1 to attach to your existing wiring or a nearby grounded surface. There are some lights similar...
    view full answer...
  • Replacement Lights For Optronics MC44, 1 Wire Lights In Red and Amber LED Lights
    Yes, we do have the Trailer Clearance or Side Marker Light # MC44AB1 available as an LED # MCL44AB1. This has the same 1 wire connection so the ground wire is achieved through the mounting hardware. We also have the Red LED # MCL44RB1 if you have any Red Lights # MC44RB1 you would also like to replace with LED's.
    view full answer...
  • Recommended Mounting Hardware For The Optronics Clearance Lights MC44AB1
    For mounting a clearance light I recommend using a few self tapping screws. Preferably a # 10 or # 8 screw like the # 101131802. You will also want some butyl tape # QR59FR, to weatherproof the screw holes. Hardware for these is basically generic and it really comes down to what surface you are mounting to. Optronics does not sell a hardware kit specifically for the # MCL44AB1 or # MCL44RB1.
    view full answer...
  • Comparing How To Wire Single Wire and Two Wire LED Lights In Box Truck
    2 wire LED lights and single wire LED lights will get wired pretty similarly. On a single wire light like the Optronics LED Trailer Clearance and Side Marker Light w/ Reflex Reflector - 6 Diodes - Amber Lens # MCL44AB1 you were looking at the wire is for power, and the light is grounded through the mounting hardware. On a 2 wire LED light like the 60" LED Lights you have the white wire will get grounded to your box truck, and the other wire is the power wire. You will need to make sure...
    view full answer...
  • How to Determine Correct Wiring Connection for Replacement LED Clearance Lights
    Clearance lights function from the running light circuit (that also powers your tail lights) and since this is typically just a 2-wire hookup the extra wires on your lights could simply be there to allow multiple clearance lights to be wired together. Very often in trailer wiring a white wire serves as ground; based on your photo that would make the green wire the + wire for the running light circuit. You can simply test the light wires on the trailer while you have 12V power connected...
    view full answer...
    Image 1 for
  • Replacement Housings For The GloLight 118a And 117r Trailer Clearance Lights
    We have both the replacement lens and assemblies for the GloLight 118a and GloLight 117r trailer clearance lights. They are available in both an incandescent part # MC44AB and an LED part # MCL44AB1 bulb for the amber lights. For the red lights, you will need part # MC44RB for the incandescent bulbs and part # MCL44RB for the LED version. The replacement lens assemblies for the amber housings is part # A44AB whereas the replacement lens for the red housings is part # A44RB.
    view full answer...
  • Troubleshooting Side Maker Lights Not Working When Going From 2-Wire Lights To 1-Wire Connections
    It sounds like when you connected your single wire marker light like the Optronics LED Trailer Clearance and Side Marker Light # MCL44AB1, your ground connection on that side was removed. This would cause all the other lights on that circuit to no longer work. The single wire style marker lights ground themselves when through the mounting hardware. If your mounting hardware is not grounded to the frame and the frame back to the trailer connector you will not have a complete circuit. If...
    view full answer...
  • What Gauge Wire To Use For Lighting On A Box Truck
    For that I recommend using either a 14 or 16 gauge wire. Either will able to safely handle the amp load for the lights on your box truck. We offer the # DW02412-1 for a 14 gauge or the # 16-1-1 for a 16 gauge wire. Both are sold by the foot.
    view full answer...
  • One Wire Clearance and Side Marker Light Options to Replace Lights on Horton Hauler Trailer
    We have quite a few different options for trailer clearance lights with one wire and that will ground through the mounting hardware. These lights come in various sizes and shapes. The best replacement for your trailer will depend on the size light you are wanting to replace. For a small LED clearance light that is a stud-mount, you can use the Optronics Sealed Mini Rectangular LED Stud Mount Trailer Clearance Light. For an amber light you will want # MCL95AB and for a red light # MCL95RB....
    view full answer...

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Info for this part was:

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