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

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

Part Number: MCL65RB
In Stock
$12.58
Retail:$24.46
You Save: 49%
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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. Great 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 1-800-940-8924 for expert service.
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Optronics Trailer Lights - MCL65RB

Highlights

  • Fewer Replacements Needed: LEDs last 50 times longer and draw only 0.048 amps at 12.8V.
  • Reliable In Any Weather: Sonically sealed, waterproof housing keeps water out even when submerged.
  • Easy Power Connection: Works with standard 1-prong or 2-prong plugs for quick setup.
  • Slim Fit Anywhere: Thinline 3-15/16" x 1-1/4" design fits tight spaces on your trailer.
  • Clear, Bright Visibility: P2 rating provides a 90° beam for use as clearance or side marker light.
  • Built To Last: Durable polycarbonate lens and housing resist impact and wear.

Features to know about

Brighter, Longer-Lasting, and Efficient: 3-Diode LED Light

This thinline light uses three white LEDs behind a red lens to deliver bright, clean visibility without the heat or fragility of old bulbs. At just 0.048 amps on a 12.8V system, it runs efficiently while lasting up to 50 times longer than incandescent lights. You get consistent brightness with no filaments to break and no bulbs to replace, so it’s ready to go whenever you are.

Fighting Water Damage: Fully Submersible, Sonically Sealed Design

If your trailer ever sees rain or the boat ramp, this light is built for it. The housing and lens are sonically sealed into one waterproof unit, keeping out water that could corrode wires or damage diodes. Its sealed build makes it a dependable pick for wet environments where moisture usually shortens light life.

Tight Mounting Spaces: Slim and Simple Installation

The Thinline Series lives up to its name with a low-profile 3-15/16" long by 1-1/4" wide design that fits tight spots along the trailer’s frame. It surface mounts using bracket A65B (sold separately) and connects easily with standard 1-prong or 2-prong plugs—no complicated wiring, no wasted time getting it in place.

Clear, Compliant Illumination: P2-Rated Output

This light’s P2 rating means it throws a 90-degree beam spread—45 degrees on either side of center—for proper coverage when used as a clearance or side marker light. It meets DOT requirements for that role, helping your trailer stay visible and compliant on the road.

Built Tough for Everyday Use: Durable Polycarbonate Housing

The red lens and housing are made from durable polycarbonate that stands up to impact and vibration. That toughness, combined with the sealed LEDs, makes this light a solid upgrade from more fragile incandescent setups—ready for miles of bright, low-maintenance performance.

Specs

Dimensions

  • Length: 3-15/16"
  • Width: 1-1/4"
  • Thickness: 7/8"

Dimensional diagram of Optronics MCL65RB Thinline LED Trailer Clearance or Side Marker Light showing rectangular red lens and measurements for length, width, and thickness.


Electrical

  • Power draw at 12.8V: 0.048 amps
  • Voltage: 12V DC electrical systems

Lighting

  • Diodes: 3
  • Lens color: Red lens over white LEDs
  • Rating: P2 rated
  • Compliance: DOT compliant

Construction

  • Shape: Rectangle
  • Housing and lens material: Polycarbonate
  • Mount type: Surface mount (with bracket A65B - sold separately)
  • Waterproof: Sonically sealed, submersible housing and lens

Warranty

  • Lifetime warranty on LEDs

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

Alternate part number: MCL-65RB





Customer Satisfaction Score:

Ratings & Reviews

4.8

2627 reviews
5 Stars
(2356)
4 Stars
(188)
3 Stars
(38)
2 Stars
(18)
1 Star
(27)
Review sort icon
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.

by:

Great products and service.



by:

Great Price



by:

Great product



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by:

Exactly what we needed.
Thanks!



by:

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.



by:

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.



by:

Perfect replacement part! Great service & pricing.

Paul L. profile picture

Paul L.

4/30/2014

Excellent - no issues, working great



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



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Great replacement light.



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Good product n fast shipping!



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GOT WHAT I ORDERED



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Easy to install replacement



by:

These worked well on a Featherlite 8127 trailer



by:

A exact replacement and good product.



by:

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



by:

Would always buy from you at etrailer. Thanks
Rob



by:

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!



by:

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



by:

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



by:

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

Mike L. profile picture
Etrailer Expert

Mike L.

11/28/2018

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.



by:

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



by:

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 .



by:

Fast service. Lights fit perfectly.



by:

Easy replacement and much brighter than the incandescent lights.


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