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Optronics Thinline LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Red Lens

Optronics Thinline LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Red Lens

Item # MCL65RB
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Optronics Clearance Lights - MCL65RB
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In Use/Installed

3-15/16" x 1-1/4" Rectangle. Waterproof, LED trailer light serves as either a clearance or side marker light. Durable polycarbonate housing and lens. Surface mount to trailer. Accepts standard 1-prong or 2-prong plugs. P2 rated. Lowest Prices for the best trailer lights from Optronics. Optronics Thinline LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Red Lens part number MCL65RB can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (2112)
  • Q & A (6)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - MCL65RB

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

3-15/16" x 1-1/4" Rectangle. Waterproof, LED trailer light serves as either a clearance or side marker light. Durable polycarbonate housing and lens. Surface mount to trailer. Accepts standard 1-prong or 2-prong plugs. P2 rated.


  • Rectangular LED trailer light functions as a clearance light or a side marker when properly mounted
  • 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 lens over white LEDs
  • Compatible with 12V DC electrical systems
  • Surface mounts to trailer with bracket (A65B - sold separately)
  • Accepts industry standard 1-prong or 2-prong plug
  • DOT compliant
  • P2 rated


  • Dimensions: 3-15/16" long x 1-1/4" wide x 7/8" thick
  • Diodes: 3
  • Power draw at 12.8V: 0.048 amps
  • Lifetime warranty on LEDs

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # LED1040-6A
Truck Lite # 19250Y
Grote # 47093
Peterson # M161A
Maxxima # M20350Y

Optronics MCL65 Series Thinline LED Marker Clearance 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.

MCL65RB Optronics ThinLine 12V Clearance or Side Marker Light - LED - Submersible - 3 Diodes - Rectangle - Red Lens - P2 Rated

Alternate part number: MCL-65RB

California residents: click here

Customer Reviews

Optronics Thinline LED Trailer Clearance or Side Marker Light - Submersible - 3 Diodes - Red Lens - MCL65RB

Average Customer Rating:  4.9 out of 5 stars   (2111 Customer Reviews)

3-15/16" x 1-1/4" Rectangle. Waterproof, LED trailer light serves as either a clearance or side marker light. Durable polycarbonate housing and lens. Surface mount to trailer. Accepts standard 1-prong or 2-prong plugs. P2 rated.


These worked well on a Featherlite 8127 trailer


Upgraded to LED. No more burnt out lights. Love it


I have ordered parts for my truck , my friends cars and trucks . Service is always up front , parts are mad clear , I think i made 1 or 2 phone call and was taken care of right a way you know your stock . Shipping is always no problem with in a few day most the time it it before due date. Great people to deal with . Lots of other company should take your lead in service. Over the years i don't think i had to return anything but i have no doubt it would be the same service .


Bought these lights to replace on our horse trailer. They work great, easy to install and look better than the original lights we replaced. Would buy these lights again and would recommend.


Great place to buy what you need. Great customer service!


Product contains no information on strange connections on back. Discovered no way to hang on the surface. Would not order again.

The MCL65RB lamp you purchased needs a mounting bracket like part A65PB in order to be installed. The bracket includes sockets that receive the pins on the back of the lamp. Because there are a number of mounting options and kinds of brackets available, the bracket isnt included with the lamp. If you take a look at the links below, you can see the available brackets that are compatible with this lamp.
-- Etrailer Expert Mike L - 11/28/2018


Quality product! The LEDs light up brightly. They're brighter than i expected! I bought enough to change out all my trailer lights, it worked out well. So far they've been through some extreme weather. I've used the trailer in heavy rain, high heat, through winter and freezing temps, and many washes. They haven't leaked and lenses still look great. It's only been a year and I'm hoping these will last many many more.


The etrailer products are sold at a fair price . The quality of their products is well above average and I will go back to this online company time and time again


Would always buy from you at etrailer. Thanks Rob


Excellent light. Exactly as described and works perfectly as a replacement for the broken one on my horse trailer.


The replacement trailer light was easy to install and works great!


Great product


Products were delivered FAST! I was able to talk with someone via email about my order and received answers almost immediately. You just can't beat that type of customer service!


A exact replacement and good product.


Great replacement light.


Perfect replacement part! Great service & pricing.

Excellent - no issues, working great
Paul L - 04/30/2014


Great products and service.


Used on rear of boat trailer in the middle, nice brite light for reasonable price.




Exactly what we needed. Thanks!



The LED is best.


Great Price


Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Comparison Between Optronics LED Clearance Light # MCL65RB and # MCL65CRB
    We have found that the # MCL65RB is a bit brighter. The white LEDs seem to penetrate the red lens better than the red LEDs through the clear lens of the # MCL65CRB. You can see this pretty clearly in the product demonstration videos I have linked to. There is a black # A65PB or chrome finish # A67CB mounting bracket available. The mounting bracket features a power wire, and would provide a ground connection via its connection to the trailer frame. If the lamp is not being directly...
    view full answer...
  • Which is Brighter? The Optronics Light # MCL65RB or # MCL75RB
    The Optronics Trailer Lights # MCL75RB would be brighter than the Optronics Trailer Lights # MCL65RB as it has 4 LEDs and the # MCL65RB only has 3. The # MCL75RB actually draws 0.06 amps at 12.8 volts. Check out the review videos I attached for each light.
    view full answer...
  • Recommended Trailer Fender and Lights for Boat Trailer with 13" Wheels
    You can use the Fulton Single Axle Trailer Fenders with Top and Side Steps # F008574-2 which are designed to be used with wheels up to 14" large, so they'll work with your 13" wheels. To mount these fenders you'll want to use the Galvanized Steel, L-Shaped, Bolt-On Brackets for Plastic # PF775-BKT-2; you could also use the existing brackets you've got on your trailer if you'd like. For the lights, you can use the Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes -...
    view full answer...
    Image 1 for
  • Submersible Red and Amber Fender Running or Side Marker Lights for Fulton Fender # F008574-2
    I went out to the warehouse to measure the fenders # F008574-2 for you. The angled portion is 5-1/4 inches by 2-7/8 inches, so you could absolutely add a light there. We don't have the exact light measurements you gave but we do have other submersible options. My recommendation is the Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber Lens # MCL65A24B and Red Lens # MCL65RB with Black Bracket and Single Wire Plug for Thin Line Series Trailer Clearance...
    view full answer...
    Image 1 for Image 2 for
  • Recommended Clearance Lights for Pace America Trailer
    I recommend going with the Thin Line LED Trailer Light, # MCL65AB for amber lights and # MCL65RB for red lights. These sealed, dual-bulb lights can be used as a clearance or side marker lights. I have included a link to a video review and installation video of these lights for you. To mount the light, you will also need a bracket like # A65PB for black or # A67CB for chrome.
    view full answer...
  • Availability of LED Version of Optronics Thinline LED Trailer Clearance Light MC65RB
    The # MCL65RB is an LED version of the # MC65RB that you referenced in your question. The LED version is brighter than the incandescent as well. I attached a review video for this LED light for you to check out as well.
    view full answer...

Do you have a question about this Trailer Light?

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Patrick B
Video Edited:
Patrick B
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Amy B
Updated by:
Amy B
Employee Brian T
Updated by:
Brian T
Employee Dustin K
Video by:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee Hayden R
Installed by:
Hayden R

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