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

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

Part Number: MCL61ARB
In Stock
$7.94
Retail:$9.62
You Save: 17%
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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 etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - MCL61ARB

Highlights

  • Brighter, Low-Draw Lighting: Two white LEDs shine through red and amber lenses for clear visibility with only 0.048 amps at 12.8 V.
  • Reliable In Any Weather: Sonically sealed, waterproof design keeps water out for lasting performance even when submerged.
  • One Light, Two Directions: Amber faces forward and red faces rear to mark both ends of the fender.
  • Slim Fit Anywhere: Thinline 3-7/8"x1-1/4"x7/8" body fits tight trailer spaces.
  • Simple Power Connection: Works with standard 12 V DC setups and accepts 1- or 2-prong plug.
  • Long-Life LEDs: Last 50 times longer than bulbs—no filaments or replacements needed.

Features to know about

Brighter and More Efficient Lighting: Dual-Face LED Design

Old incandescent lights can be dim, fragile, and power-hungry. This thinline LED fender light uses two powerful diodes that shine bright with less draw—just 0.048 amps at 12.8V. The amber lens faces forward and the red lens faces rear, keeping both directions clearly visible. Because it’s all solid-state, there are no filaments to burn out, and the LEDs last up to 50 times longer than old bulbs. You get a brighter, cleaner glow with less power wasted.

Built for Harsh Conditions: Sonically Sealed and Submersible

Water damage is the enemy of trailer lights, but this one is built to take it on. The red and amber polycarbonate lens and housing are sonically sealed into a single waterproof piece. That means it’s fully submersible—perfect for trailers that see water or constant road spray. The sealed body keeps moisture away from the diodes and circuit board so this light stays reliable season after season.

Low Profile for Tight Spaces: Thinline Design

Space can be tight along a trailer fender, which is why the Thinline Series design works so well. At only 3-7/8" long, 1-1/4" wide, and 7/8" thick, it tucks neatly onto the fender without sticking out or catching gear. The surface-mount setup uses bracket A65B (sold separately) and fits standard 1-prong or 2-prong plugs like A65P, making installation simple and clean without extra drilling or wiring headaches.

Reliable Performance and Versatility: P2-Rated Output

Visibility from the right angle matters for safety. This light carries a P2 rating, producing a 45-degree beam to either side for a total of 90 degrees of coverage. It works well as either a clearance light or side marker light depending on where you need visibility most. Paired with its durable housing and long-life LEDs backed by a lifetime warranty, it’s a simple, dependable lighting solution that just works.

Specs

Dimensions

  • Overall dimensions: 3-7/8" long x 1-1/4" wide x 7/8" thick
  • Distance between mounting holes (center on center): 3"

Dimensional diagram of Optronics MCL61ARB Thinline LED Trailer Fender Light showing length, width, and mounting hole spacing for installation reference.

Electrical

  • Power draw at 12.8V: 0.048 amps
  • Voltage: 12V DC
  • Diodes: 2

Warranty

  • Lifetime warranty: on LEDs

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





Customer Satisfaction Score:

Ratings & Reviews

4.9

868 reviews
Review sort icon
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.

by:

don't forget to buy the mounting brackets that they plug into...
Great build quality.



by:

Perfect plug in replacement for my snowmobile trailer fenders



by:

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



by:

Had a heck of a time finding a replacement marker light for my new trailer! (Lost it in Chicago?) Fortunately found the exact replacement at etrailer! Way to go etrailer!



by:

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.



by:

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!



by:

Haven't used yet but look identical to what's on my trailer currently



by:

The lights worked out perfectly. Still bright as ever! Thanks etrailer for a great product & fast shipping.



by:

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



by:

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!



by:

Exact replacement



by:

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.



by:

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. profile picture

Nate T.

4/24/2021

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



by:

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.

Joann profile picture

Joann

12/29/2022

Still working perfectly!



by:

Works well
This is exactly what I n
eeded.



by:

Worked great



by:

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!



by:

Excellent replacement for my incandescent fender lights. These actually sit a little more proud than the old lights and look really great! I've been an eTrailer customer for 15 years and they have all the products, with excellent service! Shout out to Will, who helped me with several orders!



by:

Product was delivered promptly and as promised, and the picture/description matched exactly what I ordered/received. Very happy with my purchase and their inventory, and would definitely conduct business with this company again - no question. 5 Stars!



by:

100 out of 100



by:

fast shipping, great communication and the product matched the description



by:

The lights look identical to the original. Have not tried to install the one yet, but will as soon as I can. Thanks.



by:

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.



by:

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!



by:

Exactly what I ordered, and ahead of expected delivery date. Thank you.!

Lazer S. profile picture
Etrailer Expert

Lazer S.

1/13/2026

You're very welcome, Dave! Glad we could help! : ) Looks good on there too. What are you typically towing?


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See what our Experts say about this Optronics Trailer Lights

  • Availability of Dual Color Fender Lights
    Hey Derrick, I will definitely pass that along and see if they will add it to the filter. Did you find the lights you needed? If you're still looking we have the following available: -Optronics Thinline LED Trailer Fender Light w/ Bracket - Submersible - Amber/Red Lens # MCL67ARB -Incandescent Trailer Fender Light w/ Reflector - Red/Amber Lens - # BA44FNL (Driver) # BA44FNR (Passenger) -LED Trailer Fender Light w/ Mounting Bracket - Waterproof - 2 Diodes - Amber/Red Lens # OPT49FR -TecNiq...
    view full answer...
  • Will Optronics Light MCL61ARB Fit Bracket A65PB
    Hey Jason, Appreciate the purchase, and I can confirm for you that yes, the Optronics Thinline LED Trailer Fender Light # MCL61ARB does indeed fit and will work with the Black Bracket and Single Wire Plug # A65PB.
    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 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...
  • 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...
  • 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...
  • 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 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...
  • 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...

Do you have a question about this Trailer Light?


Info for this part was:

Employee DeAnne T
Written by:
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