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Optronics Thinline LED Trailer Fender Light for Trailers Over 80" Wide - 10 Diodes - Amber/Red

Optronics Thinline LED Trailer Fender Light for Trailers Over 80" Wide - 10 Diodes - Amber/Red

Item # MCL65ARB
Our Price: $16.20
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Shipping Weight: 0.09 lbs
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3-15/16" x 1-1/4". Waterproof LED marker light can be installed on your trailer fender. Amber light faces front, and red light faces rear. Surface mount with bracket (not included). Accepts standard 1-prong or 2-prong plug. P2 rated. Great Prices for the best trailer lights from Optronics. Optronics Thinline LED Trailer Fender Light for Trailers Over 80" Wide - 10 Diodes - Amber/Red part number MCL65ARB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (817)
  • Q & A (0)
  • Photos

Optronics Trailer Lights - MCL65ARB

  • Clearance Lights
  • Rectangle
  • LED Light
  • Red and Amber
  • 4L x 1W Inch
  • Surface Mount
  • Rear Clearance
  • Side Marker
  • Submersible Lights
  • Optronics

3-15/16" x 1-1/4". Waterproof LED marker light can be installed on your trailer fender. Amber light faces front, and red light faces rear. Surface mount with bracket (not included). Accepts standard 1-prong or 2-prong plug. P2 rated.


  • Dual-face LED trailer light installs on your trailer fender
  • Thinline Series has a low profile so that light can fit in tight spaces
  • 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
  • Durable polycarbonate housing and lens
  • Red and amber lens over white LEDs
  • Compatible with 12V DC systems
  • Surface mount on trailer with bracket (A65B - sold separately)
  • Accepts industry standard 1-prong or 2-prong plug
  • P2 rated


  • Quantity: 1 fender light
  • Dimensions: 3-15/16" long x 1-1/4" tall x 7/8" thick
  • Distance between mounting holes (center on center): 3"
  • Diodes: 10
  • Power draw at 12.8V: 0.048 amps
  • Lifetime warranty on LEDs

Optronics Thinline MCL65 Series LED Fender 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 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.

MCL65ARB Optronics Thinline LED Trailer Fender Light for Trailers Over 80" Wide - Submersible - 10 Diodes - Amber/Red Lens

Alternate part number: MCL-65ARB

California residents: click here

Customer Reviews

Optronics Thinline LED Trailer Fender Light for Trailers Over 80" Wide - 10 Diodes - Amber/Red - MCL65ARB

Average Customer Rating:  4.9 out of 5 stars   (817 Customer Reviews)

3-15/16" x 1-1/4". Waterproof LED marker light can be installed on your trailer fender. Amber light faces front, and red light faces rear. Surface mount with bracket (not included). Accepts standard 1-prong or 2-prong plug. P2 rated.


Direct replacement on my Circle J horse trailer fender.


Perfect replacement fit. Thank you Etrailer for the help and the outstanding customer support.


I’m very pleased with these replacement fender lights. What a great idea to have the amber and red combination in one! A huge step up from what I had been using. Even though the lights were loose in the box I received, they are fine.


These lights were exactly what I needed, I didn't find them any where else, I have an all Aluminum Trailer and they go on the fenders, as the law requires for trailers over 80" wide.
Thanks for a good product at a good price and very reasonable shipping, I always use the USPS when I can.


Fit perfect and works great. Good quality and would buy again.


I used this as a direct was perfect.price was perfect...i received them on time..i highly recommend this product and ETRAILER


Quick delivery even quicker installation worth every penny


Exact replacement for fender light on Adam horse trailer. Needed to clean ground contact for full illumination of all diodes.


I can see the amber part of the light very well shining in my rear-views in daylight; don't yet know if this will be a distraction at night. Very visible compared to non LED.
This light is made to accommodate a good sized bracket mounting screw under it; if you use a pan head screw you shouldn't have to worry about interference-check first.



This light is the real deal. Get yourself a pair.


pics of installation


I purchased these lights for the fenders on my trailer over a year ago. These are not only brighter then my original ones but are also more durable. I travel all over the USA with my trailer and have never had an issue with these lights. I would definitely recommend these to anyone thinking of replacing their lights. This company ships fast as well.

Clifford V.


These lights are great. I highly recommend them


Not my first order from etrailer and definitely not my last. My only complaint would be in the packing of small or fragile items loosely in a box with heavier items. One of the trailer light mounts was broken when it got here. No other issues though.

Etrailer Expert

Laura E.


We do our best to package our orders so that they will arrive to you in good condition. I will send this to our shipping department manager for review.


Lights were exactly what I needed to lower the total draw from the 15 running lights on my trailer that kept blowing out the fuse on my Honda Pilot. And they are brighter than the old style. Easy to install - just pops right in. Thanks


Haven't installed them yet, but am pleased with the product. Looks like they will be more visible than the OEM lights. Will edit review once I install and lite 'em up. Thanks etrailer.

Rex H.


Happy. Very pleased with the results.


Easy install. I bought all new LED lights for my Haulmark trailer and was ready for the road in minutes. Thanks!

Mr. T.


Great Products at a great price. My local store wanted to charge me more than twice the price I was able to purchase from you.I will purchase from your company within the next two months. I have additional lighting requirements for my trailer.


My truck is grey, my trailer is grey, I replaced all the marker and tail lights on my 09' 7x14 tandem HaulMark with these and now have better visibility during the day. After a year i still am very happy. I noticed the lights are directional, so if your at the side during the day you have to look at them straight on to see if they are working but thats really not an issue. You have markers on all four sides just for that reason as well as reflectors. I have actually gotten unsolicited compliments from other contractors on the trailer since i got these.


It will not mount on a flat fender.

Etrailer Expert

Jenny N.


I wanted to reach out to help. Did you already have a mounting bracket like part # A67BB for the light? It would help to make sure that the light mounts level to the fender.


Easy installment. Best prices! Super br ight!


Great replacement parts for my enclosed box trailer that was damaged in the Camp Fire in 2018. The trailer held up pretty well but the marker lights, tail lights and fender lights all melted during the fire. These were perfect replacements and mounted very easily.


The CSR Terri was awesome!
She helped
me with questions and took my order over the phone.


Upgraded all lighting to LED lights on 2006 Haulmark utility trailer. The new LED lighting provides highly visible safety clearance lighting for night and day use. etrailer website is easy to use, my orders were quickly filled and promptly delivered. Good job!


This particular LED Light was purchased to replace a previously installed light which broke. While the lights are effective cost wise, they are not especially durable for utility trailer fender applications. I do believe that these lights would be better suited for a van style trailer fender application.


I cant tell you how disappointed I am...........that I did not find out about until now. The LED marker lights that I installed on my Haulmark Lowhauler are simply amazing. They are brighter than the big name companies truck lites out there that I had bought. It is too late for me to return my other lites but I went ahead and changed all the lights on my Nautique boat trailer with your products. It is the difference between night and day. Thanks for the great products. You have gained a NEW LOYAL customer. Speaking of that... I placed another order today. Thanks again!!


I have no idea how you get my order so quickly


I bought the series of thin line replacement lights for my 2005 Haulmark trailer. They fit and worked perfectly, are as visible as the originals (with restored color as well - the old ones were sun-faded) while drawing much less power.

Now the 5 amp fuse that most cars have for a tail light will safely run all of the tail, clearance, and interior lights on the trailer without blowing the fuse.

The first time I plugged in the trailer with the original lights it blew the fuse (without even the interior lights on).

Buying these lights was the perfect solution. Now any flat 4-wire plug on any car can be used to operate the trailer.

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • LED Replacements for Trailer Clearance Light Part 154A-R and PM-102
    The closest LED replacement we have for the Trailer Clearance Light part 154A-R is the Thin Line LED Fender Clearance Light part # MCL65ARB. This light has both a red/amber lens, 10 diodes, and measures 3-15/16" long x 1-1/4" wide x 7/8" tall. For a direct fit bracket/harness you will need to use the Black Bracket and Single Wire Plug part # A65PB. The closest LED replacement we have for the Trailer Clearance Light part PM-102 is the Round Marker / Clearance Light part # MCL0039ABB. This...
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  • Recommended Replacement for Optronics MCL61ARB
    I have some good news, we carry the Optronics Thinline LED Trailer Fender Light - Submersible - 2 Diodes - Red/Amber Lens # MCL61ARB. This should be the exact same light you have so it is the perfect replacement.
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  • Replacement Bracket for Optronics Thinline LED Fender Light
    I believe you are just needing the wired bracket for your Optronics Thinline LED # MCL65ARB, which can be found with part # A65PB. I have attached a short video review on this component that you can check out as well. If this isn't what you're referring to please let me know and I will be happy to look into this further.
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  • Replacement Rectangular LED Light Combination Amber/Red
    I have a couple options for you that are going to be a close match to the Peterson Piranha LED Clearance Light # M161R . # MCL65ARB is 3-15/16" long and a 10 diode LED light that is amber on the left and red on the right. This is a surface mount light and does not come with a mounting bracket. # MCL67ARB is the same light that comes with a mounting bracket included. If you were looking for a 2 diode light you can use # MCL61ARB which does not come with a mounting bracket. If you're looking...
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  • Wiring a 2011 Victory Motorcycle and Trailer for Towing
    For simplicity, I would recommend wiring the motorcycle trailer as a vehicle trailer would be. A powered converter wiring kit, like part # C59496, would be connected to the motorcycle, which would provide a 4-pole trailer connector. The converter combines the brake lamp and the directional signal onto one circuit. The 4-pole connector utilizes four circuits, the white wire which is the ground, the green wire carries the right turn and brake light combined on one circuit, the yellow wire...
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  • Recommended LED Trailer Lighting For Over 80 Inch Wide EZ Loader Boat Trailer
    For your trailer wiring, I recommend the Submersible LED Trailer Light Kit w 25' Wiring Harness # TL16RK along with the Identification Light Kit for Trailers over 80" Wide - Submersible - 3 LEDs - Red # MCL22RK3B. I recommend the Sealed, Thin Line LED Fender Clearance Light for Trailers Over 80" Wide, 10 Diode - Amber / Red # MCL65ARB for your fender lights.
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  • Replacement Mounting Plate for Kaper II Side Marker Lamp 1A-V-1260AR
    I may have a solution for you, but the 1a-v-1260ar part number you've mentioned corresponds to a Kaper II marker lamp, which is a brand that we do not carry. However, it looks like the Optronics Thinline LED Trailer Fender Light for Trailers Over 80" Wide - 10 Diodes - Amber/Red # MCL65ARB is a similar light and the back mounting plate for that MC65 series light is the Black Molded ABS Mounting Bracket for Thin Line Series Clearance, Side Marker Lights # A65B. I've linked a photo of the...
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  • Recommended LED Clearance Light that is Red and Amber
    The Optronics LED clearance light that is similar to # MC65RB, but will be amber and red, is the Optronics LED clearance light # MCL65ARB. This light is sealed, waterproof and is a surface mount. The dimensions are 3-15/16 inch length by 1-1/4 inch width by 7/8 inch deep. You will need a bracket and plug like # A65PB to complete the installation of the Optronics LED trailer light # MCL65ARB. Another option you may like is the LED clearance/marker light with a bracket and wire # MCL67ARB....
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  • Are Optronics Fender Clearance Lights MCL65ARB and MC65ARB the Same Size
    Yes, the two Optronics lights you referenced, # MCL65ARB and # MC65ARB, are LED and standard incandescent versions of the same Thin Line fender clearance light. Both install with 3-inch mounting hole spacing and both measure 3-15/16 L x 1-1/4 W x 7/8 D. LED lights offer the advantages of needing less power, not requiring routine bulb replacement and generating less waste heat. They also do not tend to change color (becoming yellow over time) the way incandescent bulbs do.
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  • Confirming The Optronics Thinline LED Trailer Fender Light And Black Bracket For Marker Lights Fit
    I did contact Optronics to confirm that the Optronics Thinline LED Trailer Fender Light for Trailers Over 80" Wide # MCL65ARB will work in the Black Bracket and Single Wire Plug for Thin Line Series Trailer Clearance and Side Marker Lights # A65PB. Included are additional video resources for both solutions.
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  • Fender Bracket for Optronics Thinline LED Trailer Light # MCL65ARB
    For the black molded fender bracket that works with the Optronics Thinline LED Trailer Light # MCL65ARB you will need the part # A67BB, which is indeed sold separately. This bracket includes the lead wire for power. If you are just needing the standard surface-mount bracket you can use part # A65B for just the bracket itself or # A65PB for the bracket and wire.
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  • How To Attach the Black Molded Fender Bracket A67BB
    In order to attach the Black Molded Fender Bracket part # A67BB I recommend using the Self-Tapping Phillips Head Screw part # 1131832 because the head will sit closer to the base and will allow for the Optronics Thinline LED Trailer Fender Light part # MCL65ARB to sit flush. The Black Molded Fender Bracket we offer grounds via the mounting hardware so a ground wire is not present but if you have a version of this bracket that does have a ground wire then you can just snip this and tape...
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  • Availability Of Red LED Clearance Light Comparable To Optronics MCL0039ABB
    I have a replacement light option for you, but there is not a red version of the now discontinued LED Clearance or Side Marker Light with Reflector - Submersible - 1 Diode - Round - Amber Lens MCL0039ABB available. The closest option is the LED Trailer Clearance and Side Marker Light with Reflex Reflector - 2 Diodes - Red Lens # 328-K-500B which is still 2-1/2" in diameter, but has a different mounting pattern. This light has a 3 bolt pattern with 1-5/8" between the holes as shown in the...
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    Image 1 for
  • Fender Light Bracket Recommendation for Cargo Mate Box Trailer
    For the Black Molded Fender Bracket # A67BB that you referenced the correct light assemblies have both an amber and a red light on them since one side will be for the front (amber) and the other side of the light will face the rear (red). The two options are part number # MC65ARB for an incandescent bulb and # MCL65ARB for an LED. This setup can be made to fit nearly all fenders so it would work well for you.
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  • Chrome Base Recommendation for Optronics Thinline LED Trailer Fender Light # MCL65ARB
    Yes, we have a chrome bass for the # MCL65ARB as the part # A67CB.
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  • Does Optronics Black Molded Fender Bracket # A67BB Come with 1 or 2 Brackets
    The fender bracket, # A67BB, is sold in quantities of 1. It is designed for use with Optronics lights # MC65ARB or # MCL65ARB.
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  • Fender Clearance Light Replacement for 2010 Cimarron Horse Trailer Norstar VP 3H GN
    Yes, the light part # MCL65ARB is the correct replacement for what you sent in a picture of on your horse trailer. The mounting bracket in the picture is the same as the part # A65PB so it's a match.
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  • Is Optronics Sealed, Thin Line LED Light # MCL65ARB Interchangeable Without Wiring Changes
    The Optronics Sealed, Thin Line LED Light # MCL65ARB with a sonically-sealed, waterproof lens in a single-unit housing can be used for both the right or left fender without changing the wires. However, to use the LED trailer light # MCL65ARB, you will need the Optronics Black Bracket and Single Wire Plug # A65PB. The kit combines a black molded ABS, surface mount bracket and a molded plastic, single-wire plug and its single-wire design grounds through mounting hardware. This item will...
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  • Is Bargman 40-40-104 Fender Mount Red/Amber Clearance Light Submersible
    The Bargman Fender Clearance/Side Incandescent Marker Light # 40-40-104 is not rated as a submersible light. But we do have combination red/amber lights that are submersible and you can see all of these on the linked page. These include fender-mount lights like # MCL65ARB and both incandescent and high-efficiency LED versions. You might care to refer to the linked article on trailer lighting requirements.
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  • Trailer Fender Clearance Light Recommendation
    Yes there is a base that comes with the trailer originally that the discontinued Bargman Trailer Fender Light part 40-40-104 is designed to fit into. On new installations you would add the base but it is not something we stock. Instead the Optronics Thinline LED Trailer Fender Light for Trailers Over 80" Wide part # MCL65ARB and Black Bracket and Single Wire Plug for Thin Line Series Trailer Clearance and Side Marker Lights part # A65PB will make a complete installation kit for you. Check...
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  • Is Mounting Hardware Included with Optronics Trailer Light Mounting Bracket # A67BB
    The mounting hardware is not included with mounting bracket # A67BB. I recommend using screws because with rivets, if you have to remove the bracket for some reason, you may need to drill out the rivets. Screws are much easier to work with. Using steel for a good ground is recommended.
    view full answer...

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Info for this part was:

Employee Michael H
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Michael H
Employee Jameson C
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Employee Brandon M
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Employee Adam R
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Employee Jacob T
Video Edited:
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Employee Kathleen M
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Employee Dustin K
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Employee Laura H
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Employee Wilson B
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Employee Hannah L
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