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Old bulbs can fade or fail when you need them most. This Optronics oval light packs 6 LEDs behind a red lens, giving you clean, bright illumination while drawing only 0.040 amps at 12.8V. LEDs like these last 50 times longer than standard incandescent bulbs and don’t waste energy as heat. You get crisp light that boosts visibility without adding strain to your wiring.
Whether you’re upgrading older lights or replacing cracked ones, this light’s solid build makes things easy. The ABS housing and acrylic lens stand up to vibration and exposure, so you won’t be replacing brittle or corroded parts down the road. With no filaments to break, it’s a true “install it and forget it” setup that stays dependable through years of use.
This 4" long x 2-1/16" tall x 1" deep light mounts easily on 3" centers. It’s built for surface-mount installations, so there’s no need for special brackets or grommets. The straightforward 2-wire setup—one power lead and one ground—means you can tie it into your existing circuit quickly and be back on the road in minutes.
Keeping your trailer visible doesn’t have to mean adding extra parts. The built-in reflex reflector handles that job, meeting DOT P2 lighting requirements and removing the need for a separate reflector. It provides a bright return of light to other drivers even when the LEDs are off, helping you stay compliant and safe with one clean installation.
This light’s P2 rating delivers a 45-degree beam spread to each side of the centerline, for a total of 90 degrees of coverage. That focused pattern makes it ideal for use as either a clearance light or a side marker light—whichever role you need it to fill. It’s a precise, purpose-built beam that enhances visibility right where it matters.
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
These are good lights with pretty secure covers. They work great and bolt up exactly where the old ones did. The only issue I saw was that the wires can easily get pinched when mounting these on a surface with a center hole. These seem to be designed for the wires to be routed out of the side or bottom of the light, not the back. No biggie though.
Good clearance light. Gives off plenty of light at night and in low light situations. etrailer.com has great customer service and will take care of you.
These lights are an excellent upgrade for my pop-up camper. I highly recommend them over incandescents for replacement of old faded marker lights.
Installed in old light position without a problem. One issue - polarity was not an issue with the old lights but is an issue with the LED'S.
I ordered some of these previously after a few years of fighting with incandescent bulbs in the trailer marker lights. These LED units are much brighter and will last many times longer than the incandescent units. In my initial order, I had somehow managed to miscount how many I needed, so this order is to replace the last few of the old style markers & bulbs still remaining.
These are very bright compared to the single bulb 12V standard lights they replaced. Excellent for clearance lights on the side rear of the horse trailer
Lights work great, very bright. Easy wire connect and mounting was a breeze.
Cheryl
7/24/2021
These lights are great. Easy to install and bright.
LED lights are the way to go. The reflective marker lights are great for times when the lights aren't on yet headlights will reflect off them letting the driver know there is something there. The only thing would be better on these lights would be a better ground.
These lights are just what was needed to replace old incandescent lights on a small camping trailer pulled behind a motorcycle. These are bright so as to be seen better by others because motorcycles are sometimes more difficult to see compared to larger vehicles and the LED lights are easer on the motorcycles electrical system. Shipping was prompted, the product is as described by etrailer and arrived in good condition.
I replaced a red LED marker light on my RV a year ago. The original leaked water and failed after about 4 years. It was easy to swap out. It is still dry inside and functions fine.
Timothy B.
11/18/2023
2-year update: The LED marker light is still dry and continues to function fine. I will definitely buy it again if needed for another location on my RV.
Great product fast shipping. with the two wires I could mount them on fiberglass with no worries.
Thanks e trailer, great job. lights work great and are very bright...
Jim B.
5/14/2014
Lights are great, super bright and no corrosion issues. Exactly as described, great price and great service and shipping.
A good light, but there are issues.The LED's emit a yellow light, not white. While the lens is red, it gives the light is almost an umber color and not quite as intense. The potential for a discussion on the color when lit is there. The mounting holes are positioned too close to the center LED compartment to accept hex hex head tapping screws. It's do able but difficult. The light itself is well made with all components includind the 20 guage aluminum wire encased in resin.
John G.
10/23/2013
It turns out that the lens had been switched on the light base. The proper base has red LEDs not yellow with a red lens. When paired properly, a bright red light is emitted.
Easy install. It had the white (ground) wire ready to go. Hopefully, it will last longer than what was replaced after only one year in service.
Works well, wires could be longer to make insulation easier.
You guys have always been great. You have products that I haven't been able to find anywhere else.
I really like them. I’m ordering more for the rest of my motorhome.
Great job guys
Gwendolyn Y.
2/12/2025
Hey! Camper looks great, Thomas!
Excellent service Excellent shipping
Your the best ! Thank you
I used this side marker to replace existing Bargman 99 series lights on a camping trailer. The Optronics LED model was not quite as bright as I would expect for a 6 diode unit, but still an improvement over the incandescent model. It is larger in size than the Bargman 99 series, so it covers up any surface imperfections on the trailer.
Product arrived on time. These are great lights. Staff was very helpful.
Easy install and bright marker light. I also used two on the top back side of my horse trailer as an extra turn signal and brake light. My existing turn signal and brake lights were really low on the trailer and these helped it become more visible when I was slowing down or turning.
etrailer's Excellent product at a very competitive price and fast shipping were the key to successful completion of my trailer repairs.
Great service kept me informed of the shipping progress right from the start. Installed them works great. For some reason wouldn’t let me upload photos.
Dave
11/6/2025
Still working no problems.
The led lights are of excellent quality, embedded to mounting base with epoxy. Strong and waterproof, service was fast and so was shipping.I am 100 % satisfied with this co. and the products they sell.
With several of the MCL31 clearance I had half or all of the LEDs stop working. I did not at the time realize they had a lifetime guarantee so I just threw them away. When A bunch of the LEDs in both BUL52CBs and about half of the turn/stop LEDs in the STL37RB went out, I contacted etrailer and they happily replaced them, but it took a couple of weeks and I had to pay the shipping. When I replaced all of my trailer lighting, I had thought that I would never have to worry about it again. LEDs should last forwver. That turns out to not be the case and it is a lot harder to change out hard wired LEDs than socketed incandescent bulbs. I wish I could find reliable long lasting LED trailer lighting.
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Bob K.
5/28/2018
Working great