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Swapping out old incandescent lights for this 4" Optronics ONE Series LED tail light means you get a single high-output diode that shines brighter while using less power. At 12.8V, it draws just 0.25 amps for stop and turn and only 0.007 amps for tail. With no filaments to break and no bulbs to replace, this LED lasts up to 50 times longer than standard bulbs, keeping your trailer visible and reliable for years.
Water intrusion is no match for this light. The housing and red lens are sonically sealed into one waterproof unit that keeps moisture and debris out. Whether you’re backing into the water or driving through storms, the sealed design protects the single diode and circuit board from damage so the light stays bright and dependable.
Built to handle vibration and impact, the polycarbonate lens and housing resist cracking and wear from road debris or constant use. The surface-mount technology (SMT) circuit board is designed for better shock resistance and improved heat distribution, giving you a tough, steady light that won’t quit under rough conditions.
Installing this round 4-inch LED tail light is simple thanks to the recessed mount with built-in flange. It accepts a standard 3-prong plug (A45PB or A47PB, sold separately) so wiring is straightforward. Measuring 5-1/2" overall diameter by 2" deep with mounting holes spaced 4-1/4" center-to-center, it fits cleanly for a professional look without complicated setup.
This light meets DOT standards as well as FMVSS 108 and CMVSS requirements for automotive lighting, so you know it’s built to perform safely on public roads. It’s a dependable choice for anyone wanting a bright, efficient upgrade that meets every regulation right out of the box.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to be taking a look at part number STL003RFB. This is the Optronics One-series round LED trailer light. It's going to serve as your brake light, your turn signal light, and your tail light. It's going to feature a sealed waterproof housing and lens unit. LEDs are going to be more efficient. They're going to use less power, and they're going to last much longer.
They're going to make for great replacements when it comes to replace your incandescent lighting systems. This uses surface-mount technology so it's going to protect the LEDs from shock and vibration. The diode is actually mounted directly onto the circuit board, so it's going to offer better heat distribution. It's going to allow for an overall thinner construction, and it's going to help withstand bumps and shaking. The One-series is going to contain 1 LED. It's going to last longer. You don't have to worry about replacing your bulbs, you don't have to worry about brittle filaments, and they're much more efficient. We're going to have a sturdy poly-carbonate lens and housing unit.
We've got the red lens with the black housing. Here on the back side we're going to have the standard plug. This is going to accept your industry standard 3-prong plug. That's going to be sold separately. You can find those here on our website.
It's going to have the built-in flange for installation. That's going to contain 3 mount holes. It is Department of Transportation compliant. We're going to go over some basic measurements real quick, starting with the diameter of just the lens area. That's going to give us a diameter of about 4 1/4 of an inch. Overall diameter including the mounting flange, we're looking at about 5 1/2 inches.
If we take a look at the overall depth, it's going to give us a measurement of about 1 3/4 of an inch from the front of the light to the back of the plug. If we take a measurement from this area right here, so measuring the inner part of that flange to the same point on the opposite side, that's going to give us a measurement of about 4 1/2 inches. Our mounting holes, these are going to be separated on center, apart from one another, by 4 1/4 of an inch. That's going to be the same distance between each mounting hole. And those mounting holes are going to give us a diameter of about 3/16 of an inch. Now your mounting hardware is not including, so that will need to be provided separately. Optronics is going to put a lifetime warranty on the LED system. Let's go ahead and hook it up to our external power source, that way you can see what it looks like with power running to it. Simply just take our 3-prong plug, place it into the connection point here at the back of the light, push it all the way. It creates a really nice, tight seal. Then we can turn off our overhead lights to see it in a low-light setting. This is going to be the tail-light or running light function, and then when we apply our brakes, you can see how that increases the signal output for a brighter signal. It's going to do that when we activate our turn signals as well. (pause) That's going to do it for today's look at part number STL003RFB. This is the Optronics One-series round LED trailer light.
Ratings & Reviews
Heather A.
10/2/2018
If you are looking for a brighter 4 round LED light, I recommend part # STL42RB. Part STL42RB is designed with 10 super light-emitting diodes. You will need a pigtail part # A45PB to install it.
Cleon W.
5/3/2019
To date, 5/3/19 the trailer lights have endured the riggers of neglect and abuse. No chips, cracks or failures...ZERO maintenance to boot. My kinda product. You can not go wrong on purchasing these bullet proof literally and figurative stopturn lights!
James
3/8/2020
Well the trailer lights are still working. And I have plans to rebuild the trailer and will use these lights some more. Hope that I will never have to buy another set of light EVER.
Info for this part was:
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Heather A.
6/20/2018
The plug you will need with this light is part # A45PB.
Helpful Links
Accessories-and-Parts/Optronics/A45PB.html