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Optronics LED Trailer Clearance or Side Marker Light w/ Reflector - 6 Diodes - Rectangle - Red Lens

Optronics LED Trailer Clearance or Side Marker Light w/ Reflector - 6 Diodes - Rectangle - Red Lens

Item # MCL44RB1
Our Price: $9.19
Trailer Lights
Shipping Weight: 0.09 lbs
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4" x 1-1/2" Rectangle. Waterproof, LED trailer light serves as either a clearance or side marker light. Built-in reflex reflector. Durable ABS housing. Surface mount to trailer - hardware not included. 1-Wire design. P2 rated. Great Prices for the best trailer lights from Optronics. Optronics LED Trailer Clearance or Side Marker Light w/ Reflector - 6 Diodes - Rectangle - Red Lens part number MCL44RB1 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (167)
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Optronics Trailer Lights - MCL44RB1

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

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


  • Rectangular LED trailer light functions as a clearance light or 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
  • Durable ABS housing and acrylic lens
  • Red lens over white LEDs
  • Compatible with 12V DC electrical systems
  • Surface mounts to trailer - hardware not included
  • Single wire design grounds through mounting hardware
  • DOT compliant
  • P2 rated


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

Optronics MCL44 Series 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.

MCL44RB1 Optronics LED Trailer Clearance or Side Marker Light w/ Reflex Reflector - 6 Diodes - Rectangle - Red Lens - P2 Rated

Alternate part number: MCL-44RB1

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics LED Trailer Clearance or Side Marker Light w/ Reflector - 6 Diodes - Rectangle - Red Lens - MCL44RB1

Average Customer Rating:  4.8 out of 5 stars   (167 Customer Reviews)

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


These LED lights are easy to install and work well. Have had them on my trailer for a year



No problems a year out, as would be expected.


Very good LED trailer light. Extremely bright. Make sure you order the correct item. There are single wire or dual wire options.


Led is thw way to go on these cargo or work trailers bulbs are antiquated now and work only if bulb is good or aeated. Led takes that away. Thanks etrailer top notch in my book


Great looking lights, easy install, wiring for amber/red lights matches wiring style of trailer. Only downside, is that the lenses crack easily when prying them off, because the seal is so good. If doing a whole trailer, order some replacement lenses as a back-up. Also, make sure to pry the lenses from the middle of the long side of the lens, NOT the ends.


These items is just what I was needing. Now I don't have to worry about every year when I start checking my trailer to get it road ready, of having to tap the clearance lights and or replace bulbs just to get it road.
From the minute I made contact with one of the sales people in customer service of etrailer I immediately felt at ease and confident I was going to be satisfied and get the replacement parts I needed and that being, the LED replacement clearance lights for my trailer. I would surely recommend this company and the service they provide to anyone. I am truly grateful for their assistance and the products they sell.


This is a great, overall product. Lights are bright, and can be seen in the daylight. Installers should be careful when snapping lens covers on... They're very snug (they seem almost watertight!) and I cracked two of seven, and had to order replacements. (they do sell just the lenses... but I found out too late.


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


I bought this light to start replacing the incandescent lights on my trailer. This store makes it easy to find which light I needed to start this project. And they also carry a better selection, I will use them again.


Etrailer always seem to have the parts I need.I appreciate the kind quick service!


I bought both this and the amber 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.

Juan L.


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.


I have an enclosed motorcycle trailer that came with stock incandescent lighting. I like the LED lights because of the reduced power draw and that there virtually indestructable. These replaced the last of the stock lighting. They fit in exactly the same position as the stock ones. They are used as side marker lights towards the rear. So now my trailer is 100% LED lighting and the price was right!

Thomas M.


Working fine! I check them out whenever I tow my trailer but theres really no need cause I know they work Every Time!


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 !!!!



These lights are still working perfectly !!


Great service.


Easy to install and bright



Work perfect


I purchased these LED marker lights for my cargo trailer to replace the original incandescent markers that were failing from corrosion after only a few years. Since these were the same manufacturer, the lenses are exactly the same - now I have a handful of spares! The marker lights were mounted with the same screws, but I did have to re-drill for the wiring as the LED wire exited the base at a different location. Installation was a breeze, and the LED is brighter, and will hopefully last much longer.


As usual, great quality and quick service. Thanks.


Exactly what I needed and prompt delive ry.


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.


Exact replacements for Pro Line Trailers. I just wanted to a little more lighting and they are a perfect match.

Paul P.


All is Good , No Problems. Going to place another order soon.


Product was good but did not match the one we have


Product is what was ordered and works well. Service from E-trailer was excellent. Thank-you


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.


The site is laid-out very very well. It's easy to find exactly what you're searching for. - My item was exactly as described & I'll be back for more items as I need them.
I especially liked the way the order/item was 'tracked' while en-route.

I recommend '' for quality items & excellent customer service/communications.


The lights replaced the ones that were broken on the back of my camper.


This is an exact replacement for a light on my camper that I lost the lens to. Good quality and fast service.

Terry R.


Still works good.

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • 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.
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  • Red Version of Amber Clearance Light # MCL44AB1
    Yes, we have the red version of the # MCL44AB1 as part # MCL44RB1.
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    For an LED version of the part # MC44RB we have the part # MCL44RB1 which matches the dimensions you referenced.
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    The Sealed, Rectangular LED Trailer Clearance and Side Marker Light, 14 Diodes - Amber, # MCL49AB, is also available in red as # MCL49RB. We do have several red marker lights as well that are close in size and shape. Take a look at Rectangular LED Trailer Clearance, Side Marker Light with Reflector, 2 Wire, 6 Diode - Red, # MCL44RB and # MCL44RB1. These lights are 4 inches wide by 15/16 inches deep by 1-1/2 inches tall. If you need a specific replacement, look for a serial or model number...
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    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.
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  • Installing Trailer Marker Light With Two Black Wires
    You'd simply attach one wire to power from the taillight circuit, the other should ground to the trailer frame. I'd look closely at that wires to see if one has a white stripe indicating ground.
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    The trailer clearance/marker light you referenced, Bargman 99 Series # 3499001, grounds through one of the two wire connections made at its rear surface receptacles. The mounting screws for the white base portion do not make any electrical connections. You can attach a ground wire between the light and a rust-free bare metal surface on the trailer, such as one of the mounting holes, to establish your ground connection. For a light that grounds through its mount you could use # MCL44RB1...
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  • How to Determine if Replacement Lens A44AB or A44RB Will Fit
    I searched but could not find any specific lights for a 1998 Trails West trailer; that said, it is pretty easy to determine if the correct replacement lenses are the Replacement Lens - Amber # A44AB and Red # A44RB. The easiest way, of course, would be if you happen to know what Optronics series light you have as these are direct replacements for MC44 Series and BA44 Series. That's not something most people know though, so the other thing you can do is take a measurement. Your current...
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    We don't carry just a lens replacement for the Glo Brite 446 but we have the very similar Optronics LED light replacement part # MCL44RB1 for a red replacement that would work well! It's an LED and priced great too so it would be an easy solution.
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    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.
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    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.
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  • 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.
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    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....
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