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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
Our Price: $6.94
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Trailer Lights
Shipping Weight: 0.09 lbs
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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. Great 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 or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - MCL61ARB

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

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 Satisfaction Score:

Customer Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (809 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.


These fender lights are perfect replacement for my Aluma trailer! I had a cracked one so I bought two so they’re both new awesome product. Trailer always has the perfect parts or replacements I need for my numerous trailers. Thanks!


Great communication. Competitive price and fast delivery. Will but again


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.


Just like the original


It is an exact match to the fender running lights I currently have on my horse trailer. This was the only site that I was able to find them.



Still working perfectly!


spares to inventory. None used yet.


plug and play.


The part is what I was looking for! Thank you.



The product is working great!


The shipping was awful. Looked like a kid threw the stuff in a box with no packaging and shook it up. We'll be lucky if they all work.


Product is as advertised. Order process was simple and processing was as promised. I highly recommend


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.

Etrailer Expert

Rachael H.


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.


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!


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.

Nate T.


No issues. Still works great after multiple launches and being completely submerged in water.


Works exactly as I wanted! Converted entire trailer to LED


The light was a perfect fit and is still working one year later. Thanks E-Trailer.


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.


The fender lights came sooner than expected and they fit perfectly. Couldn't ask for any better service.


Exact replacement for the original ligh ts.


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!


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


These lights are high quality products and they are also hard to find from other suppliers! I recommend them for your fender mount lighting needs.


Fast shipping. Items as described.


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


Exactly as advertised. Fit like a glove and works like a charm. That's all you can ask from a trailer light.


It is an exact replacement for my trailer. I was glad to see that the light does not have the etrailer stamp on it like is shown in your pictures. I couldn't find this light anywhere locally. I was glad to find it on your website. Thanks!

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • 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.
    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 looking...
    view full answer...
  • 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...
    view full answer...
  • Availability of Red and Amber Optronics Trailer Taillight # OPT36FR
    That specific red and amber trailer clearance light was discontinued but we do have a somewhat similar option with the part # OPT49FR that would work great for you.
    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...
  • 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...
  • 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...
  • 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...
  • 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. Most likely we have what you are looking for but you will need to first determine what vent...
    view full answer...

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