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If you’re upgrading from old incandescent lights, this ThinLine LED gives you brighter visibility without the high power draw. With three red diodes under a red lens, it delivers clean, efficient light while only pulling 0.048 amps at 12.8V. The LEDs last up to 50 times longer than standard bulbs, so you won’t be replacing filaments or worrying about burnt-out bulbs anytime soon.
Moisture and road spray can ruin ordinary lights, but this sealed unit is built to handle it. The polycarbonate housing and lens are sonically sealed into a single waterproof piece that’s fully submersible. Whether it’s rain, washdowns, or a dunk at the boat ramp, water stays out so the diodes and circuit board stay protected and working.
When space is limited, this light’s slim shape makes installation easy. Measuring 4-1/8" long by 1-1/4" tall and just 1-3/16" deep, it sits close to the surface with a clean look. The included chrome bracket keeps it secure while adding a polished finish that blends into most setups without sticking out or catching on anything.
This surface-mount design keeps wiring straightforward. It attaches flat against your trailer using the chrome bracket and just one wire for power—the ground connects right through the mounting hardware. With 3" center-to-center mounting holes and a 12" wire lead, setup is quick and tidy with no need for large holes or extra harnesses.
For dependable visibility where you need it, the P2 rating gives you a precise beam—45 degrees to either side of center—for a total of 90 degrees of coverage. Mounted correctly, it works as either a clearance or side marker light, giving you consistent performance with a focused output that enhances safety day or night.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
How's it going, neighbors Today, we're gonna take a look at the Optronics ThinLine side marker light. Now, this guy is in red, and it has a chrome base on it, so it'll match your layout. Now, one of the cool things about this guy is the fact that it is just your hot wire, and it's grounded by your bolts when you install it. Super easy install, especially if you're doing it as a direct replacement. So let's take a closer look at it and see what's special about it. So it's two parts to this guy right here.
You're gonna have the actual light unit itself. This is sealed, so you don't have to worry about moisture getting on the inside. And it's three diodes and you have these two pole connectors. Now, as far as your ground, this guy right here is what's gonna ground against your frame here, and you're just gonna run your wire from your wiring harness. So I already have existing holes.
I had a similar model. It just went out. It was actually incandescent, so we're gonna switch it out for an LED. I'm gonna start by just making sure my wire fits into the existing space and see how it lines up. If it doesn't, I can always use my self-tapping screws to create new holes.
And this actually has the exact same footprint, so we're good to go. So first, I'm just gonna strip the end of my wire here. All right, so we're gonna go ahead and make our connection using our butt connector, and we're also gonna use our heat gun to make sure our shrink wrap engages with the wire as well. All right, so I'm gonna go ahead and hit it with some power, and it looks like our light is working, so now we're good to go. It's just that easy for your replacement.
You have a lot of different variety as far as if you're gonna go with amber or if you're gonna go with red. And personally, I think Optronics does a great job of creating lights that can deal with real-life situations. Once you get this guy installed, please let me know what you think, 'cause I'd love to hear, you know, just your feedback. So again, this is Ed with etrailer.com taking a look at the Optronics Thin marker or clearance light. Have a great day.
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
John
9/20/2019
After a year and around 2500 miles, the lights continue to perform flawlessly. It was a good decision to convert to LEDs and I will not wait as long should there be a next time.
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Lazer S.
9/25/2026
Nice truck, Ernest! The lights definitely look good on there! ^___^ Is this your every day truck or more of a cruiser?