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LED Clearance and Side Marker Trailer Light w/ Flange - Submersible - 7 Diodes - Round - Red Lens

LED Clearance and Side Marker Trailer Light w/ Flange - Submersible - 7 Diodes - Round - Red Lens

Item # MCL58RMFB
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Optronics Trailer Lights - MCL58RMFB
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3-1/2" Diameter. Waterproof trailer light serves as either a side marker light or a clearance light. Durable polycarbonate housing and lens. Surface mount with built-in flange. Weathertight connection. Accepts standard 2-pin PL-10 plug. 7 LEDs. Lowest Prices for the best trailer lights from Optronics. LED Clearance and Side Marker Trailer Light w/ Flange - Submersible - 7 Diodes - Round - Red Lens part number MCL58RMFB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Optronics Trailer Lights - MCL58RMFB

  • Clearance Lights
  • Round
  • LED Light
  • Red
  • Surface Mount
  • 3-1/2 Inch Diameter
  • Submersible Lights
  • Optronics
  • Rear Clearance
  • Side Marker

3-1/2" Diameter. Waterproof trailer light serves as either a side marker light or a clearance light. Durable polycarbonate housing and lens. Surface mount with built-in flange. Weathertight connection. Accepts standard 2-pin PL-10 plug. 7 LEDs.


  • Round trailer light can function as both a clearance light and a side marker light when properly mounted
  • Sonically sealed, waterproof housing and lens unit is submersible
  • Durable surface-mount technology (SMT) construction of LED circuit board
    • Better withstands shock and vibration
    • Allows improved heat distribution and thinner construction
  • 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 lens and housing
  • Red lens with white LEDs
  • Compatible with 12V DC systems
  • Surface mount with built-in flange - hardware not included
  • Weathertight connection accepts weathertight plug (AL42PB - sold separately)
  • DOT compliant
  • PC rated


  • Quantity: 1 clearance/marker light
  • Overall dimensions: 3-1/2" diameter x 1-3/8" thick
    • Base diameter: 2-11/16"
    • Lens diameter: 2-1/2"
  • Distance between mounting holes (center on center): 2-5/8"
  • Diodes: 7
  • Power draw at 12.8 volts: 0.057 amps

Optronics MCL58 Round LED Clearance and Side Marker Light Diagram

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.

Weathertight Wiring Connection

Optronics MCL58RMFB Watertight Plug

This light has a weathertight connection as pictured above (weathertight plug sold separately). This type of connection is designed to help block out moisture.

PC-Rated Lights

Diagram of light spread for PC rated light

A PC-rated light produces a 90-degree angle of light to either side of its centerline for a total of 180 degrees of coverage. This beam pattern can be clearly seen when you are standing directly in front of the light, as well as when you are standing on either side of the light. When properly installed, this type of light can function as both a front clearance light and a side marker light or as a rear clearance light and side marker light.

Surface-Mount Light

Surface mount light

Surface-mount lights install flat against the surface of the trailer, so a hole does not need to be cut into the trailer for the light. This type of light is installed using a flange or bracket that has mounting holes. And mounting hardware is used to secure the light to the trailer.

MCL58RMFB Optronics LED Clearance and Side Marker Trailer Light w/ Mounting Flange - Submersible - 7 Diodes - Round - Red Lens - PC Rated

California residents: click here

Video of LED Clearance and Side Marker Trailer Light w/ Flange - Submersible - 7 Diodes - Round - Red Lens

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Optronics Trailer Lights - Clearance Lights - MCL58RMFB Review

Speaker 1: Today we're taking a look at a two and a half inch round LED clearance side marker light. This sonically sealed waterproof LED light functions as a marker or a clearances light for your trailer. It is a LED system. LEDs make great replacements for incandescent lights. They last longer, they burn brighter, they're much more efficient. With LEDs you don't have to worry about replacing bulbs or worry about brittle filaments.Here on the back side it uses a unique connection point, this is called a weather tight connection.

The wiring harness that goes with this light or that works with this light is not included. It is sold separately and available at etrailer.com and it looks just like this right here. So it's a two wire design. You got your ground wire and your power wire and then it's got the head with the prongs that match up perfectly with the connection points on the back of the light.When it comes to mounting, it's a flange mount design. Mounting hardware not included, but it does have the flange that goes around.

Then you will need a cut out, so it's a recessed and flange mount design. We're looking at a durable black base with a red polycarbonate lens. It's very strong and durable. It is PC rated and it's SAE and department of transportation compliant.Taking a look at the measurements real quick starting with the overall diameter. So that's measuring edge to edge going straight across the unit.

That gives us a measurement of three and a half inches. The base, so this portion here, gives us a diameter measurement of two and 11/16ths of an inch, so you need to make sure that the cutout for this to sit in so that way it's flush is at least that measurement. Then the lens gives us a diameter of two and a half inches.We're gonna go and hook it up to power that way you can see what it looks like with some power running to it. We'll also be able to turn off our overhead lights so you can see it in a low light setting. So I just need to match up the connection points.

Turn off the overhead lights.You can see here that the light sends out a very bright consistent signal. Again, this is a light that functions as a clearance and side marker light for your trailer. Really nice design. Multiple diodes, or multiple LEDs, so the multi diode design really helps optimize the overall light output. When it comes to the power draw at 12.8 volts, we're looking at 0.057 amps, and Optronics puts a lifetime warranty on the LEDs.That's gonna do it for today's look at the two and a half in round LED clearance side marker light.


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Info for this part was:

Installed by:
Cole B
Updated by:
Ronnie R
Edited by:
Daron K
Written by:
Brian T

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