bing tracking image
  1. Trailer Lights
  2. Optronics
  3. Clearance Lights
  4. Rectangle
  5. LED Light
  6. Amber
Optronics LED Trailer Clearance and Side Marker Light w/ Reflex Reflector - 6 Diodes - Amber Lens
Optronics

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

Part Number: MCL44AB1
In Stock
$7.10
Retail:$19.92
You Save: 64%
Trailer Lights
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

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 etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (4491)
  • Q & A (0)
  • Photos

Optronics Trailer Lights - MCL44AB1

Highlights

  • Brighter, Low-Power Lighting: 6-diode LED design gives strong light with just 0.040A draw.
  • Two Functions in One: Works as either a clearance or side marker light when mounted properly.
  • Built-In Safety Reflector: Reflex reflector removes need for a separate reflector on your trailer.
  • Simple One-Wire Install: Grounds through mounting hardware for quick, clean wiring.
  • Durable Build That Lasts: ABS housing and acrylic lens resist damage for long service life.
  • Compact Fit: 4" Lx1-1/2" Tx15/16" D size mounts on 3" centers for easy placement.

Features to know about

Brighter, Longer-Lasting, and Efficient: 6-Diode LED Light

This rectangular amber light uses six LEDs that shine brighter and last far longer than old incandescent bulbs. At 12.8V it only draws 0.040 amps, so it’s easy on your electrical system while delivering clear, consistent visibility. There are no filaments to break and no bulbs to replace—just a clean, efficient beam every time you power it on.

Built-In Safety Without Extra Parts: Reflex Reflector Lens

You don’t need a separate reflector with this light. The built-in reflex reflector is molded right into the acrylic lens, keeping things simple while still meeting visibility needs. It reduces clutter and extra mounting, giving you both illumination and reflection in one compact 4" x 1-1/2" housing.

Simple Wiring and Mounting: Single-Wire Ground-Through Design

Wiring doesn’t get much easier than this. The single wire coming from the back is for power, while the light grounds through its mounting hardware—no separate ground wire needed. Just mount it to a clean, grounded metal surface using standard hardware spaced 3" apart (hardware not included), and you’re good to go.

Durable Build That Handles Everyday Use: Tough ABS Housing

Made with a sturdy ABS housing and acrylic lens, this light holds up well against vibration and weather exposure. It’s designed for surface mounting and stays sealed at the back where the power wire connects. The solid build means fewer failures and steady performance over time.

Reliable Coverage Where It Counts: P2-Rated Beam Pattern

The P2 rating means this light projects a focused 45-degree beam to either side for a total of 90 degrees of coverage—perfect for use as a clearance or side marker light when properly mounted. It gives you consistent, head-on visibility so other drivers can see your trailer clearly at night or in low-light conditions.

Specs

Dimensions

  • Overall length: 4" long
  • Overall height: 1-1/2" tall
  • Overall thickness: 15/16" thick
  • Distance between mounting holes (center on center): 3"

Diagram of Optronics MCL44AB1 amber LED trailer clearance and side marker light showing rectangular shape and mounting dimensions.

Electrical

  • Diodes: 6
  • Power draw at 12.8V: 0.040 amps
  • Compatible voltage: 12V electrical systems
  • Wiring design: 1-wire design grounds through mounting hardware

Construction

  • Lens color: Amber
  • Lens material: Acrylic
  • Housing material: ABS
  • Mount type: Surface mount (hardware not included)
  • Function: Clearance or side marker light
  • Reflector: Built-in reflex reflector
  • Light type: LED
  • Rating: P2 rated

Warranty

  • LED lifetime warranty: Lifetime warranty on LEDs

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





Customer Satisfaction Score:

Ratings & Reviews

4.8

4489 reviews
5 Stars
(3855)
4 Stars
(446)
3 Stars
(83)
2 Stars
(36)
1 Star
(69)
Review sort icon
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.

by:

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



by:

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.



by:

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



by:

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!



by:

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



by:

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 etrailer.com to stand behind their product.



by:

exactly what I wanted and works perfect today



by:

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).



by:

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.

Cornell profile picture

Cornell

7/6/2019

Outstanding.



by:

Light fit and worked great.



by:

All items working great at this time, right angle plugs where needed for clearance inside the rectangular tubing



by:

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.

Lee profile picture

Lee

8/31/2021

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



by:

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 !!!!

Thomas profile picture

Thomas

9/29/2020

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



by:

I bought both this and the red colored lights.

Product
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.

Paulo profile picture

Paulo

6/24/2016

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.



by:

We replaced our old lights on our 1995 Silverado horse trailer with these new LED lights. Wow! what a nice upgrade. So much brighter. Thank you!



by:

Good quality light, works as it should, decent price! And fast shipping.



by:

Cody was great to work with!



by:

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

Robert profile picture

Robert

9/11/2019

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



by:

These lights arrived very quickly and were easy to install.



by:

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.



by:

Replaced all parts destroyed by hail and everything’s good! Very fast service and delivery…Thank you!



by:

One year later & 13k miles the Clearance Lights are still working Great! HOWEVER, the entry light started flickering in August. Not so happy with that. Have my eye on another one should/when this one dies.



by:

Well I'll tell you the lights work finally. The old lights had a one wire system and were grounded internally so I didn't have to mess with a ground. After speaking with several people from etrailers I was told several times these are one wire units. These have a black wire coming out of the back and a loose white ground wire inside the housing which you will have to ground with your own mounting hardware. Honestly for the price I paid for these I could have gotten 3 sets of 4 off (another site) that work the exact same way. Customer service was good they were nice but mis informed me...and for the price of these and me being able to get basically the same thing off (another site) I wish I would have just gone that route..



by:

Hard to find parts available here. Quick shipping. Thank you!



by:

This was exact replacement for the side light on a mini bus


25
25

See what our Experts say about this Optronics Trailer Lights

  • LED Marker Light Upgrade for Horton Hauler Trailer
    Michael, you can use the Optronics LED Trailer Clearance and Side Marker Light with Reflex Reflector part # MCL44AB1 for your trailer, and since those 4 inch by about 1-1/2 inch lights with 3 inch mounting hole spacing are very common on Horton Haulers, this is a really solid, straightforward replacement. The mounting holes lining up is the big win here, so you will be able to swap them over cleanly and the slightly taller height won’t cause any issues as long as you’ve got normal clearance...
    view full answer...
  • 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...
  • Looking For Side Marker Light Lens For Horton Hauler Enclosed Trailer
    Hey Shawn, thanks for reaching out. We may have a lens that will work for you, and I am happy to look into it. Is there any identifying part number on your lights that you can see? If not, you can go ahead and email those pictures to me at [email protected] and I can take a look. Hopefully we have the lens you need. If not, the next step would be to look at replacing the light entirely with something like the Optronics LED Trailer Clearance and Side Marker Light w/ Reflex Reflector...
    view full answer...
  • Is the Optronics LED Trailer Clearance and Side Marker Light # MCL44AB1 a 1 Wire Light?
    Hello Jeremy. Yes, the Optronics LED Trailer Clearance and Side Marker Light w/ Reflex Reflector - 6 Diodes - Amber Lens # MCL44AB1 is a one wire light. You only need to connect the one wire that is coming out of the back.
    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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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
  • 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...
  • 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...
  • 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...
  • 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...
  • 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
  • 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 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...
  • 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...
  • Red Version of Amber Clearance Light # MCL44AB1
    Yes, we have the red version of the # MCL44AB1 as part # 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...


< Previous
12



Do you have a question about this Trailer Light?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Patrick B
Video Edited:
Patrick B
Employee Chris R
Video Edited:
Chris R
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Randy B
Installed by:
Randy B
Employee Zach D
Video by:
Zach D

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.