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Switching from old incandescent lights to LEDs makes a huge difference. This 2-1/2" round Optronics clearance or side marker light uses a single white LED behind an amber lens to give off a bright, clean signal while drawing only 0.073 amps at 12V. The LED lasts up to 50 times longer than traditional bulbs and doesn’t rely on fragile filaments, so you get consistent light and fewer replacements over time.
Installing this light is straightforward. It surface mounts directly onto the trailer with hardware of your choice (not included), and the attached gasket helps form a weathertight seal against the surface. The polycarbonate lens snaps on securely for easy access when you need it, and the 2-wire pigtail—one for power and one for ground—keeps wiring simple and universal for most setups.
You don’t need to add a separate reflector with this light. Its built-in reflex reflector adds visibility even when the LEDs aren’t powered, helping other drivers spot your trailer from different angles. That’s one less component to buy and install, simplifying your lighting system while keeping it compliant and visible day or night.
This light’s P2 rating gives it a defined 90-degree beam spread—45 degrees to each side of centerline—for clear visibility from straight on but not from the extreme side. That beam pattern makes it ideal as either a clearance light or a side marker light, depending on where you mount it. If you need both functions, just install two lights for full coverage.
The Optronics MCL0040ABB is made to handle regular use without cracking or fading. The amber polycarbonate lens and black ABS housing resist impact and weathering, making it a dependable choice for everyday towing or hauling in changing conditions. It’s not rated for submersion, but it stands up well against road spray and moisture thanks to its sealed construction and quality materials.
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
Victoria H.
2/20/2025
I'm so glad we had exactly what you needed to fix the marker light on your Forest River, Patrick! Do you have any upcoming adventures planned?
Kevin
3/27/2023
Great! No issues whatsoever
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Nick S.
9/15/2025
I will have to say this is a first! I have never seen these used in that way and it is the best thing I have seen all day! That is one of my favorite vehicles so I am glad they are working well and they look great.