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This Double Bullseye red clearance and side marker light uses two bulbs to produce noticeably stronger illumination than a single-bulb setup. The 4-1/16" long by 2-1/8" wide rectangular housing gives a wide, even glow that makes your trailer stand out at night or in low light. The dual-bulb layout also provides some built-in redundancy—if one bulb goes, the other still keeps you visible.
The black plastic base and durable lens are molded for all-weather protection against corrosion, so it holds up through road spray, dust, and temperature changes. Nothing fancy—just solid construction that keeps the internals protected so you can focus on towing instead of replacing cracked lenses or corroded sockets.
No need to deal with multiple connections. This light uses a single lead wire for power and relies on the mounting hardware for grounding. Just make sure the mounting surface provides a clean ground contact and you’re good to go. It’s a straightforward setup that cuts down on wiring clutter.
Designed around standard 3" mounting centers, this light bolts right into common brackets or existing holes. The snap-on lens makes bulb swaps quick, and both lens and bulbs are replaceable when needed. That means less downtime and no hassle when it’s time for maintenance.
At only 1-1/8" deep, this surface-mount light sits close to the body for a tidy finish while still giving off strong red illumination. The bullseye lens design adds a classic look that fits cleanly with most trailer lighting setups without sticking out or snagging gear.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we are going to show you Optronics Double Bulls Eye Trailer Clearance and Side Marker Light, part number MC42RB. Inside the light are two light bulbs for increased light output. It's a single wire design meaning we'll have a single power wire lead, and the light will ground electrically through the hardware used to mount it on the trailer. Both the bulbs and the lens are user replaceable. It's designed to surface mount on your trailer using the mounting holes that are three inches on center.
Next we are going to hook the light up to a power supply so you can see what it looks like when lit up. We'll connect our ground to the mounting hardware, and our power to the wire. Next we'll turn off the overhead lights so you can see what it looks like in the dark. And that's it for Optronics Double Bulls Eye Trailer Clearance and Side Marker Light, part number MC42RB.
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
Dennis W.
6/17/2016
Thank you for the concern, Everything I purchased from you are working as they should. VERY HAPPY with all.
Tony C.
11/3/2017
Still working fine - thanks
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Wayne B.
3/13/2018
They are still working great after a year. Good value.