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LED Trailer Clearance or Side Marker Light with Reflector - Waterproof - 1 Diode - Red Lens

LED Trailer Clearance or Side Marker Light with Reflector - Waterproof - 1 Diode - Red Lens

Item # OPT99FR
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3-1/2" Round. Waterproof, LED trailer light with reflex reflector serves as a side marker light or a clearance light. Recessed mount with flange. 2-Wire pigtail with butt connectors. P2 rated. Lowest Prices for the best trailer lights from Optronics. LED Trailer Clearance or Side Marker Light with Reflector - Waterproof - 1 Diode - Red Lens part number OPT99FR can be ordered online at or call 800-298-1624 for expert service.
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Optronics Trailer Lights - OPT99FR

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

3-1/2" Round. Waterproof, LED trailer light with reflex reflector serves as a side marker light or a clearance light. Recessed mount with flange. 2-Wire pigtail with butt connectors. P2 rated.


  • Round trailer light serves as either a side marker light or a clearance light
  • Built-in reflex reflector eliminates the need for a separate reflector
  • Sonically sealed, waterproof housing and lens
  • Durable surface-mount technology (SMT) construction of LED circuit board
    • Better withstands shock and vibration
    • Allows for improved heat distribution
  • 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
  • Compatible with 12V DC systems
  • Recessed mount with built-in flange - hardware not included
    • Requires a 2-3/4" diameter cutout for installation
    • Foam mounting gasket creates a weathertight seal
  • 2-Wire pigtail with butt connectors
  • P2 rated light produces a 90-degree beam pattern
  • DOT compliant


  • Overall dimensions: 3-1/2" diameter x 1-9/16" deep
    • Light diameter: 2-1/2"
  • Diodes: 1
  • Power draw at 12.8 volts: 0.045 amps
  • Lifetime warranty on LEDs

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.

MCL002RXHWB Optronics LED Side Marker or Clearance Trailer Light with Reflex Reflector - Waterproof - P2 Rated - Red - Flange Mount

California residents: click here

Video of LED Trailer Clearance or Side Marker Light with Reflector - Waterproof - 1 Diode - Red Lens

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

Video Transcript for Review of Optronics Trailer Lights - Red LED Clearance Light Reflector - OPT99FR

Ellen: Hey everybody. I'm Ellen here at and we're taking a really quick look at the Optronics LED light for your trailer. This is going to give you a side marker light, as well as a rear light. It has the reflector, so other people can see what's going on with your trailer even at night. And then we'll have our two wires to connect for our power and ground. Then I see about these as they do already have the connectors installed.

They have some heat shrink butt connectors. These are for the 14 to 16 gauge wire. So the blue heat shrinks are usually for that size of wire. So you can just put in the wires to run into these guys, use a heat gun and shrink them down. And that'll give you a nice water-tight connection between those wires.

So kind of a nice improvement. It's nice they're already installed. So that's one less thing you got to worry about.As far as the size and dimensions, we'll take a look at all of that and make sure that this is the right size for you. Again, it is an LED light. So it's going to give you that clear side marker light for your vehicle.

You can use this as a side marker or clearance light since it's just P2 rated. That means it's only going to give you a 90 degree beam. So somebody can't see it from both directions. So if you wanted to have this to do both those functions or kind of put it on a corner so that people could see all the way around you, you'd actually have to get two lights to do that since you can only see it in that 90 degree view. And there's a pretty good diagram on our website here at that explains that a little bit more fully.It's just a single diode that gives you that light.

I'm going to hook this up to power and ground so you can see how bright that is. It's not going to be super bright or really illuminating a wide area. It's just going to be enough so that other people can see your trailer while you're out on the road with those lights on. So I'm going to get my little alligator clamps in there. Hopefully those will be long enough. There might be a little bit of flashing just because of my connection here. Since I'm just using these alligators clamps. Here we go. So I got to hold my power in to get it to turn on, but you can see that lights on there. And with the studio lights out, you can see just how bright that is. So again, not super bright, but enough that other drivers can see you and know where your trailer is.Put those off to the side. And then as far as measurements, the outside edge of the light is about three and a half inches in diameter. It does have this little kind of foam ground at the backs of that does help us to stay pretty water tight. We put this over here. The cutout this will need to fit into is about two and a half inches in diameter. We'll have three mounting holes, and those are spaced apart about two and three quarter inches apart center to center, going across that triangle there. It looks like about quarter inch hardware should work just fine for these. The connector or the wires coming off here, I'll give you a measurement of how much lead you get. Should be enough to get them connected up, but never a bad idea to know what you're working with. So it looks like you got about seven inches of wire to work with here.The lens and housing is made out of polycarbonate. Again, those are the LED, does make it a longer lasting bulb or longer lasting light than your typical incandescent light. Did we work better in all kinds of terrain and should last you longer and have less chance that you'll ever need to replace it unless that housing cracks, but polycarbonate it's usually pretty good at withstanding most impacts. As far as the reflector, again, you can see the light reflecting there. It is waterproof, has a sonically sealed housing. So you should be able to use this on just about any kind of application you'd want. It's a single diode. The power draw at 12.8 volts is 0.045 amps, and there is a lifetime warranty on the LED and it is DOT compliant.That's pretty much it for our look at the Optronics LED Clearance Marker or Side Marker light. I hope this has been helpful in deciding if this is the right one for you. We do have a lot of other options available here at So check them out. Thanks for watching.


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Info for this part was:

Employee Kathleen M
Installed by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
Noah M
Employee Daron K
Edited by:
Daron K
Employee Brian T
Written by:
Brian T

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