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Optronics ONE LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 1 Diode - Round - Red Lens
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Optronics

Optronics ONE LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 1 Diode - Round - Red Lens

Part Number: STL003RFB
In Stock
$8.85
Trailer Lights
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etrailer Installation
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4" Diameter round. Waterproof, LED trailer tail light provides stop, turn, tail function. Single diode provides increased light output. Recessed mount with built-in flange. Accepts standard 3-prong plug. Great Prices for the best trailer lights from Optronics. Optronics ONE LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 1 Diode - Round - Red Lens part number STL003RFB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (31)
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Optronics Trailer Lights - STL003RFB

Highlights

  • One Light, 3 Functions: Works as stop, turn, and tail light for clear trailer signaling.
  • Reliable In Any Weather: Sonically sealed, waterproof housing keeps water out and light on.
  • Fewer Replacements Needed: Single LED lasts 50 times longer than incandescent bulbs.
  • Low Power Draw: Uses only 0.25A for stop/turn and 0.007A for tail at 12.8V.
  • Easy Connection: Accepts standard 3-prong plug for quick, no-cut wiring.
  • Road Legal: Meets DOT, FMVSS 108, and CMVSS lighting standards.

Features to know about

Brighter, Longer-Lasting Light: ONE Series LED Technology

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.

Enduring Harsh Conditions: Sonically Sealed, Waterproof Design

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.

Strong and Durable Build: Polycarbonate Lens and Housing

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.

Clean Installation: Recessed Mount with Built-In Flange

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.

Compliant and Reliable: DOT, FMVSS 108, and CMVSS Approved

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.

Specs

Dimensions

  • Overall dimensions: 5-1/2" diameter x 2" deep
  • Light face: 4-1/4" diameter
  • Distance between mounting holes (center on center): 4-1/4"

Technical diagram of the Optronics ONE Series round LED trailer tail light showing flange dimensions, overall diameter of 5-1/2 inches, light face diameter of 4-1/4 inches, and 4-1/4 inch mounting hole spacing.

  • Overall dimensions: 5-1/2" diameter x 2" deep
  • Light face: 4-1/4" diameter
  • Distance between mounting holes (center on center): 4-1/4"

Electrical

  • Power draw at 12.8V (Stop/turn): 0.25 amps
  • Power draw at 12.8V (Tail): 0.007 amps

Lighting

  • Diodes: 1

Warranty

  • LED warranty: Lifetime

STL003RFB Optronics ONE LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 1 Diode - Flange Mount - Round - Red Lens





Video of Optronics ONE LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 1 Diode - Round - Red Lens
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Optronics ONE LED Trailer Tail Light: The Breakdown

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

4.6

31 reviews
5 Stars
(24)
4 Stars
(5)
3 Stars
(0)
2 Stars
(2)
1 Star
(0)
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by:
I like these LED taillights for the "older" look I have with my 1958 CJ-6 Jeep. They are not blind the person behind you bright, but they are a great replacement for old incandescent type taillights, with less amp draw and long life span. I would recommend them for an old style build with new LED technology.
by:
2014 CrossRoads Z-1 Travel Trailer
As described. Looks well made. Purchased as a spare to keep with camper for when another fails. As long as it works when needed and installed, GREAT!
by:
Quality of the product (wheel hubs with bearings) is far greater than others I have purchased at twice the price. The LED tail lights are again excellent and for the price I will buy many more. The hubs are being used on a 3/4 scale WWII Jeep the front axle, as well as the tail lights.
by:
I’ve used this light on two of my vintage campers. I like the it uses one led bulb in the center so it’s more inline with the original. Great product and I will be using them on my next camper.
by:
no plugs connector to use them with.
Heather A. profile picture
Etrailer Expert

Heather A.

6/20/2018

The plug you will need with this light is part # A45PB.

by:
2004 Chevrolet Silverado
Slightly smaller would have saved from having to grind a bigger hole on the trailer
by:
The lights finally got here----weather/USPS/UPS problems----the lights are great and better still was the price---saved a bunch and since I have to replace them often (I break them often because of where the trailer is used) this will make it easy and cheaper to do so.
by:
2016 CrossRoads Z-1 Lite Travel Trailer
they fit good but could be brighter!
Heather A. profile picture
Etrailer Expert

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.

by:
good quality product, worked exactly as expected.
by:
working perfectly a year later.
by:
Perfect
by:
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Info for this part was:

Employee Tricia G
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Employee Laura H
Updated by:
Laura H
Employee Wilson B
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Wilson B
Employee Brian T
Updated by:
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Employee Cole B
Installed by:
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