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Optronics Thinline LED Trailer Fender Light - Submersible - 2 Diodes - Red/Amber Lens

Optronics Thinline LED Trailer Fender Light - Submersible - 2 Diodes - Red/Amber Lens

Item # MCL61ARB
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Trailer Lights MCL61ARB - Submersible Lights - Optronics
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3-7/8" x 1-1/4" Rectangle. Waterproof, 2-LED trailer marker light mounts on your trailer fender. Amber light faces front, and red light faces rear. Surface mount with bracket (sold separately). Accepts 1-prong or 2-prong plug. P2 rated. Lowest Prices for the best trailer lights from Optronics. Optronics Thinline LED Trailer Fender Light - Submersible - 2 Diodes - Red/Amber Lens part number MCL61ARB can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (2045)
  • Q & A (6)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - MCL61ARB

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

3-7/8" x 1-1/4" Rectangle. Waterproof, 2-LED trailer marker light mounts on your trailer fender. Amber light faces front, and red light faces rear. Surface mount with bracket (sold separately). Accepts 1-prong or 2-prong plug. P2 rated.


  • Dual-face LED trailer light installs on your trailer fender
    • Amber light faces front of trailer
    • Red light faces rear of trailer
  • Thinline Series has a low profile so that light can fit in tight spaces
  • Sonically sealed, waterproof 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 electrical systems
  • Surface mount with bracket (A65B - sold separately)
  • Accepts industry standard 1-prong plug (A65P - sold separately)
  • P2 rated


  • Dimensions: 3-7/8" long x 1-1/4" wide x 7/8" thick
  • Distance between mounting holes (center on center): 3"
  • Diodes: 2
  • Power draw at 12.8V: 0.048 amps
  • Lifetime warranty on LEDs

Optronics MCL61 Series Thinline 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.

MCL61ARB Optronics Thinline LED Dual Face Trailer Fender Light - Submersible - 2 Diodes - Red/Amber Lens - P2 Rated

California residents: click here

Customer Reviews

Optronics Thinline LED Trailer Fender Light - Submersible - 2 Diodes - Red/Amber Lens - MCL61ARB

Average Customer Rating:  4.9 out of 5 stars   (2041 Customer Reviews)

3-7/8" x 1-1/4" Rectangle. Waterproof, 2-LED trailer marker light mounts on your trailer fender. Amber light faces front, and red light faces rear. Surface mount with bracket (sold separately). Accepts 1-prong or 2-prong plug. P2 rated.


Perfect retro fit for the old incandescent bulbs. Snaps right into place using the old mounting hardware. No problems with the new LED's. Always work and very bright.

No issues. Still works great after multiple launches and being completely submerged in water.
Nate T - 04/24/2021


This led light is superior to any I have seen. The new lights made my 20 year old horse trailer look like new going down the road. Being visible is important to us and our livestock.


Really like these lights but by choice I have them where they take a beating sometimes. Even though I have to replace them on occasions it’s worth it to me. Actually they are really rugged, I’m extremely happy with them. Etrailer is my go to place for any trailer part!


Outstanding service and great replacement light! Works great! Thank You for the lights and other products that I purchased from you! My go to company for all my trailering needs!


Trying to swap out my trailer lights to LED, so the draw on the battery is minimal. There are so many variations on the solid color, I had to measure and keep measuring. The solids have 10 Led’s But no such luck is it’s the fender lights that are both amber and red. I guess one company can’t do it all. It would be great to include the mounting plates, especially at this price. And also to sell multi packs of two or three. I only need two amber and two fender dual color, but need seven red. Shipping was sort of slow compared to today’s shipping speeds. Back in the day it would have been speedy. Times they are a changing. Packaging was weak. Each light has a plastic bag, but maybe only two were still in the bag. Maybe some sort of sealed plastic bag would have been smart. I’m guessing these will work fine. I thought we had to be careful of the Positive and Neutral leads for LED lights because we can damage them if they go on backwards. I guess we shall find out. Thanks etrailer for actually having this product with such extensive documentation and videos. Other websites ain’t got nothin on you.

We do have several light bracket options linked at the bottom of each product page for each light. There are different configurations, and colors to suite your specific needs. At this time we do not offer these lights in a multi-pack configuration.
-- Etrailer Expert Rachael H - 06/06/2019


Great experience. I got what I needed w uickly


Perfect replacement, low cost


We have a 7x14 low rider trailer and replaced all lights and marker lights with LED lights. The figment was perfect and they look much better than original lights.


Works great.





Light purchased and installed one year to date. Works great. Would recommend E-Trailer!!


navigating website was easy. order was shipped within 25 hours. great experience overall.



We needed to replace a fender LED on our horse trailer, as usual eTrailer had the part, good price and fast delivery.


Everything I ordered was right, not damaged & in perfect condition. Very quick delivery. Thanks guys.


Hey Daniel W, Got my lites today, Friday. Am very happy with them. Actually they are much better and brighter than the originals and less expensive. Thanks for your help. You've got a customer for life. Oh and by the way, it's nice to be able to actually talk to a person. Thanks again!



Perfect fit. Just took dimensions of missing light and it dropped right in. Right price, perfect fit, thank you!

Still bright as ever, a year later. Cant even remember which one I replaced!
John W - 07/04/2017


Would always buy from you at etrailer. Thanks Rob


Trailer side marker amber/red .... 2 prong plug in ..... Exact replacement for my trailer..... fit perfectly. Shipped on time and quickly.


Received package in a good amount of time. I put it on my 4x8 trailer. It snapped in as it should. It works well. I had ordered two just Incase the other light went out. I will order from you again.


Received reasonably fast, fit like a top on my old connector as the old one was either stolen or fell off as they just clip in - inexpensive so I keep a spare now!


New marker light fit the old socket without any problems. Was easy to install , no tools need. Just snap in. Good price for the light. Would buy from again.

Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Replacement Trailer Clearance Light for a Kll 1A-V-1260AB
    I looked up the trailer light you listed and the exact replacement that we carry would be the part # MC65ARB. This light uses the part # A65PB as a mount so the part # MCL61ARB should work as a replacement for you as well.
    view full answer...
  • Does it Matter Which Pin on Thin Line Sealed LED Fender Mount Trailer Clearance is Ground or Power
    There are some lights that are not polarity sensitive such as # MCL61ARB. So it will not matter which way you place it in base # A65PB. The light will ground through the mounting hardware and the wire connects to the running light circuit on the trailer.
    view full answer...
  • Which Mounting Bracket for Optronics MCL61ARB Light
    I have a solution for you, but the # MCL61ARB does not fit in the # A67BB bracket. The # MCL61ARB light that you're using requires the # A65B bracket for mounting. You may also need the Single Wire Plug for Thin Line Series Trailer Clearance and Side Marker Lights # A65P since this light grounds through the mounting hardware (if you have a single wire light).
    view full answer...
  • Replacement Red/Amber Fender-Mount Tail Light for Aluma Motorcycle Trailer
    We do offer all sorts of trailer lighting, including fender-mount types such as # BA44FNL and # BA44FNR which are combination red/amber lights. We also have # MCL61ARB. These and all other red/amber lights are shown on the linked page. If you cannot find the correct item by reviewing the page please feel free to send us a photo or two of your trailer and lights and we can try to match it.
    view full answer...
  • 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...
    view full answer...
  • Comparable Replacement Parts for a Carry-On 2,9990lb Trailer
    Good news! I was able to look up your Carry-On Cargo Trailer and found the items you mentioned and similar products you are looking for. The Fender Clearance Light Bracket # A67BB with the LED red and amber light # MCL61ARB or the incandescent # MC65ARB will mount into this bracket and work great as a replacement for your trailer. I was unable to locate the # 11 Roof Vent Dome you referenced, we offer a variety of roof vents that could work on your trailer. See link. Best thing...
    view full answer...

Do you have a question about this Trailer Light?

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  • Most detailed, accurate trailer light information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

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  • Personalized service for life.

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  • Trusted since 1946.

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Info for this part was:

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