This round 2-1/2" amber light uses three LEDs that put out a cleaner, brighter glow while drawing just 0.06 amps at 12.8V. It’s a solid upgrade from old-style bulbs, producing high visibility with minimal power use. The LEDs are built with surface-mount technology (SMT), which helps them handle vibration and heat better, so they’ll last up to 50 times longer than incandescent lights with no filaments to burn out or bulbs to replace.
Water and electronics don’t mix—unless the housing is sealed tight. The lens and body on this light are sonically sealed into one waterproof unit that keeps moisture out, even when submerged. That means the diodes and circuit board stay protected from corrosion and shorting, making it perfect for wet conditions or repeated dunking.
Hooking this light up is easy thanks to its industry-standard 2-prong PL-2 connection. The plug (sold separately) handles both power and ground and seals the unused port to keep dirt and moisture out. It’s a straightforward, reliable setup that works cleanly with 12V systems.
This recessed-mount light fits neatly into your trailer surface for a clean, protected finish. It’s designed to be used with a grommet (sold separately) that holds it securely in place while keeping the edges sealed. At 2-1/2" in diameter and 1" deep, it sits flush without sticking out or getting in the way.
The P2 rating means this light projects a focused beam—45 degrees to each side of center—for a total of 90 degrees of coverage. That makes it ideal as either a clearance light or side marker light when mounted correctly. It meets DOT and FMVSS 108 requirements in any 360-degree position, keeping your lighting setup compliant and clearly visible on the road.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today on our equipment trailer, we're going to be installing the Optronics LED trailer clearance, side marker light, part number MCL57AB. We're going to first need to remove the old light from the rubber grommet. To do this, we'll just simply use a flat head screwdriver; work the old light out of the grommet. Here's what the connection looks like on the back side. It's a two prong plug that we just need to simply unplug for now. Here's what our new Optronics light looks like. It is an LED style, not the old incandescent style.
If you'll notice, it has exactly the same plug on the back side and there's also a little bit of dielectric grease already installed at each of the two connection points. The dielectric grease will give you a good connection over the life of the light. Now before we can reinstall our light in our grommet here, we're going to go ahead and clean the grommet out a little bit. Go ahead and get all the dirt that's built up inside the grommet out before we install our new light. Now with our grommet cleaned up, we'll go ahead and take our plug and reconnect it to the back side of our new light. We'll line up each of the two prongs and push firmly making sure that the connection goes all the way in. Now before we put the light back into place, we're going to go ahead and turn it on and make sure it works.
As you can see here, here is what our new Optronics LED side marker light looks like. Now that we've made sure that the light works, we'll go ahead and put it back into the rubber grommet. Now to help the light slide back into the grommet a little easier, we're going to smear just a little bit of grease around the edge of the grommet here. That way the light goes back into place just a little bit easier. Now it will be a little tight when you're putting the light back into the rubber grommet; that is why we added the grease. But you will still need to work at it a little bit in order to get the light to fully seat back in the grommet.
Once we have the light back in, we'll go ahead and take a paper towel and clean up any excess grease that may be on the rubber boot. And that's all there is to it, to installing the Optronics LED trailer clearance and side marker light in the 2 1/2 inch round and amber color, part number MCL57AB. .
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
look good and fit great
Quality service and products,
Thank you.
Perfect
quality product
Perfect fit to the old filament bulb fixture. Priced right.
good
These are exactly what I was looking for
Received complete order as ordered good quality and prices.
Good lights, work well & easy to instal l.
Product met all expectations.
I purchased $XX worth of led lights 6 marker lights and 2 ovals. The marker light had a protective wrapper and showed up pristine condition, however both ovals were thrown in the box with no protective wrapper the clear oval has a scratch but is still in good condition the red oval has scratches all over it to the point it looks used. Pretty Sad. Wish I could off included photos but it was hard to see the scratches In the picture my camera isn't the greatest.
Great company and customer service
they seem to be top quality and go well on my trailer
Great product and shipping was very fas t.
Excellent to deal with and fast shipping
Very fast shipping and excellent Customer Service.
Keep up the good work
Lynn
Excellent product and easy to install
I am working on mule to make it street legal. I ordered amber LED side markers, brackets, grommets and connectors. All items are reasonably price, looks good and shipped fast.
Installed on a 93 Skeeter boat trailer. Very tight fit. Had to turn the light sideways and push through Grommet to install . Right now I have it installed but until I take the boat out this weekend, I will not know if I have the wires plugged in correctly. 50/50 chance of getting it correct. Shipping was very fast.
Excellent quality part. And very quick delivery. I've ordered a number of items from etrailer, very good service.
Super fast shipping. Very happy with product and this experience.
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