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LED Trailer Clearance and Side Marker Light with Reflex Reflector - 2 Diodes - Amber Lens
Command Electronics

LED Trailer Clearance and Side Marker Light with Reflex Reflector - 2 Diodes - Amber Lens

Part Number: 328-K-501B
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$15.21
Retail:$17.59
You Save: 14%
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2-1/2" Round. Trailer light with reflector functions as a clearance and side marker light when properly mounted. Durable polycarbonate base and lens. Mounts on surface of trailer - hardware not included. 2-Wire pigtail. PC rated. Great Prices for the best trailer lights from Command Electronics. LED Trailer Clearance and Side Marker Light with Reflex Reflector - 2 Diodes - Amber Lens part number 328-K-501B can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Command Electronics Trailer Lights - 328-K-501B

Highlights

  • Brighter, Low-Draw Lighting: 2 amber LEDs give strong light output while using less power.
  • One Light, Two Jobs: Works as both clearance and side marker light when properly mounted.
  • Built-In Reflex Reflector: No need for a separate reflector to stay visible and compliant.
  • Wide 180° Coverage: PC rating means drivers see your trailer from the front and sides.
  • Simple Surface Mount: Installs flat on the trailer with a 2-wire pigtail for quick hookup.
  • Durable Build: Polycarbonate base and acrylic lens resist cracks and wear.
Made in USA

Features to know about

Brighter and More Efficient Lighting: 2-Diode Amber LED

When you switch to LEDs, you get brightness that stands out without the extra power draw. This 2-1/2" round light uses two amber LEDs that are more efficient and last up to 50 times longer than incandescent bulbs. They put out a clean, vivid light that makes your trailer easier to see while keeping the current draw low on 12V DC systems. With no fragile filaments or bulbs to replace, it’s a simple way to upgrade to reliable, long-lasting lighting.

No Extra Reflectors Needed: Built-In Reflex Reflector

Keeping your trailer visible from all angles matters. This light has a built-in reflex reflector that removes the need for a separate reflector, cutting down on parts and installation time. The amber lens with integrated reflector gives both style and safety in one piece, so you stay visible even when the light is off.

Clear Visibility from Any Angle: PC-Rated 180-Degree Beam

A wide beam means better coverage. This PC-rated light throws a 90-degree spread on each side, giving a full 180-degree viewing angle. That makes it easy to be seen from in front or from the side when properly mounted. It can serve as both a clearance and side marker light—exactly what you want for safer night driving and signaling.

Easy Mounting Anywhere: Surface-Mount Design with 2-Wire Pigtail

No need for large cutouts or complex wiring. The surface-mount setup lays flat against your trailer and only needs a small hole for the wiring. It secures using simple mounting hardware (not included) and connects with a straightforward 2-wire pigtail—one power lead and one ground. With 1-5/8" center-to-center mounting holes and a compact 2-1/2" diameter by 1" depth, it fits neatly while keeping things tidy and functional.

Tough Construction That Lasts: Durable Polycarbonate Base and Lens

Regular lights can crack or wear out fast, but this one’s built to handle everyday use. The durable polycarbonate base and acrylic lens resist impact and UV damage while keeping their shape and clarity over time. You get a dependable light that stands up to the elements so you can focus on the road ahead instead of worrying about replacements.

Specs

Dimensions

  • Overall dimensions: 2-1/2" diameter x 1" deep
  • Distance between mounting holes (center to center): 1-5/8"

Dimensional diagram of Command Electronics K-501B round amber LED clearance and side marker light showing 2-1/2 inch diameter and 1-5/8 inch mounting hole spacing.

Electrical

  • Diodes: 2
  • Wire length: 4-1/2"
  • Voltage: 12V DC system

Warranty

  • Warranty: 1-Year limited warranty

K-501B Command Electronics LED Clearance and Side Marker Light w/ Reflex Reflector - Round - Amber Lens - Surface Mount - PC Rated





Video of LED Trailer Clearance and Side Marker Light with Reflex Reflector - 2 Diodes - Amber Lens
Video Thumbnail Video Player Dialog

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




Video Transcript for Let’s Check Out the LED Trailer Clearance and Side Marker Light with Reflex Reflector

Speaker 1: Today, we're taking a look at a LED clearance or side marker light with a built-in reflex reflector. This round trailer light functions as both a clearance light and a side marker light when properly mounted. It is an LED system. LEDs make great replacements for incandescent lights. They last longer, burn brighter, and they're much more efficient. With LEDs, you don't have to worry about replacing bulbs or worry about brittle filaments.The unit features the really nice amber lens with the built-in reflex reflector.

It mounts on the surface of the trailer. You have three mount holes right there. You can gain access to those by removing the lens from the base. Mounting hardware for installation is not included. It's a two-wire pigtail, so the white wire is the ground wire, yellow wire is the power wire.

Now, the installation surface does require at least a 5/8" diameter hole for the wire base to fit into for a flush mount design. It is SAE approved, and it is a P2PC rated light.Taking a look at the dimensions real quick, starting with the overall diameter. Measuring edge to edge, that gives us a diameter measurement of about 2 1/2". The thickness of the unit, from the back of the base, right here, to the front of the lens, measures about 1" thick or 1" deep. That's how far it sticks out from the installation surface.

The distance we have between each mount hole, center on center, is 1 5/8".We're going to 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 lower light setting. You can see here that the light sends out a nice consistent signal. You can see that built-in reflex reflector.

This light features a total of two diodes or two LEDs, so the multi-diode design really helps optimize the overall light output.That's going to do it for today's look at the LED clearance or side marker light with the built-in reflex reflector.

Customer Satisfaction Score:

Ratings & Reviews

4.8

964 reviews
Review sort icon
2-1/2" Round. Trailer light with reflector functions as a clearance and side marker light when properly mounted. Durable polycarbonate base and lens. Mounts on surface of trailer - hardware not included. 2-Wire pigtail. PC rated.

by:

Good durability, easy to install, good price to value ratio. Bulbs are quite bright.



by:

exactly what I was looking for and received it very quickly!

Chantell profile picture

Chantell

11/15/2023

STILL WORKING GREAT!!!!!!!

Mike L. profile picture
Etrailer Expert

Mike L.

11/18/2023

@Chantell We're glad to hear that!


by:

These are the identical replacements needed for the trailer.



by:

Exactly what I expected, fast shipping



by:

Was exactly what I needed for 2016 motor home



by:

It was exactly what I needed to match the other lights on the trailer!



by:

Great light. The base needs to be white to match. But the light works..



by:

Exact replacement at a competitive price. Exactly what I wanted.



by:

always great price--fast shipping--great staff



by:

very quick delivery time for standard s hipping.



by:

Perfect replacement for the original light on my trailer that failed.



by:

I’ve bought several items and pleased with ever purchase. Very timely deliveries and all ahead of stated delivery date quoted. I will buy again from etrailer.
Thank you etrailer.com



by:

Perfect replacement for my old school marker lights. Lens matches original



by:

Good quality



by:

The light is just fine. I did expect white LED in it vs. amber but it's okay. I didn't see white LED specifically mentioned.



by:

Hey, Kimberly. So good to hear from you. I'm not a large volume customer, but when I need something, I need it! Yes, I am extremely pleased with the service I receive from eTrailer.com I placed this order just three days ago, received my order, and installed the clearance light this afternoon. The replacement light was a perfect fit...no installation holes to be drilled, wiring was so very, very easy. I must admit but I did view the installation video provided. As so usual, eTrade.com is my first choice in camper replacement parts.



by:

I got them today, tested them and put them on the camper!



by:

Eric B. profile picture

Eric B.

2/10/2022

Well it’s been a year and still looks and works like brand new. I would buy it again when needed. Excellent light replacement for my new camper. Ez to install



by:

I am happy with the amber lights as a good match, but I was surprised they are upside down regarding aligning with the three holes for the installation screws. The light assembly and the lens both indicate which part is "up", but this does not match the original configuration. An obvious solution was simply to turn both "upside down" so the screw holes would line up. My only concern with this was there might be more potential for the amber lens cover to either pop off from vibration or to allow some moisture into the fixture when it rains (because the part you pry up to open the lens is now on the top rather than the bottom). I am going to put a bit of clear sealant at the top of the lens (which will not be visible from below).



by:

Only place that had exact part I needed. thanks

James profile picture

James

9/13/2025

Marker light assembly matches original marker and are the same brightness. I recommend.



by:

Exactly like our original 2018 Retro RV lights. Fits on upside down but otherwise perfect with a caulk finish.



by:

Best customer service ever? You guys Ro ck...

Isabelle profile picture

Isabelle

6/20/2025

Perfect



by:

Needed replacement marker lights for a 2015 Itasca motor home. These are exact matches, fit perfectly.

John profile picture

John

4/10/2025

After one year, the lights are still in place and working. They are brighter than the OEM lights they replaced.



by:

Left extensive comments on the red version. Great product, great company.



by:

Light was a perfect match for the lights on my Camper. With so many light styles and color temperatures shopping for a match can be very difficult. etrailer.com is my go to for my lighting needs. I’ll be looking to them for my other trailer needs and will give a review on them in the future.


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Info for this part was:

Employee Cole B
Installed by:
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Employee Wilson B
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Employee Justice A
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Employee Daron K
Edited by:
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Employee Brian T
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