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Optronics LED Hardwired Trailer Light - Stop, Tail, Turn, Backup - Round - Red/Clear - 14 Diodes
Optronics

Optronics LED Hardwired Trailer Light - Stop, Tail, Turn, Backup - Round - Red/Clear - 14 Diodes

Part Number: OPT66KB
In Stock
$26.88
Trailer Lights
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5-1/2" Round. Low-profile waterproof light serves 4 functions: brake, tail, turn, and backup light. Mounts on surface of trailer with built-in flange - hardware not included. 4-Wire pigtail with bullet connectors. 12 Diodes. Great Prices for the best trailer lights from Optronics. Optronics LED Hardwired Trailer Light - Stop, Tail, Turn, Backup - Round - Red/Clear - 14 Diodes part number OPT66KB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - OPT66KB

Highlights

  • One Light, 4 Functions: Works as stop, tail, turn, and backup light for full rear visibility.
  • Reliable In Any Weather: Sonically sealed, waterproof, and submersible housing keeps water out.
  • Fewer Replacements Needed: 14 efficient LEDs use less power and last longer than bulbs.
  • Simple Wiring Setup: 4-wire pigtail with 0.180" bullet connectors makes hookup easy.
  • Quick Surface Mounting: Built-in flange installs cleanly on trailer—no extra brackets.
  • Road Legal: DOT compliant so your trailer lighting stays within regulations.

Features to know about

Brighter and More Reliable Lighting: 14-Diode LED Output

This 5-1/2" round LED trailer light puts out strong, even illumination using 14 diodes that handle stop, tail, turn, and backup functions all in one. The LEDs run on 12V, drawing far less power than old-school bulbs while lasting much longer. You’ll notice the clear, distinct light pattern that makes your trailer visible day or night without worrying about frequent bulb changes or dimming over time.

Built to Handle the Elements: Waterproof and Submersible Design

Road spray and water crossings are no problem for this light. Its housing and lens are sonically sealed into one waterproof unit that’s fully submersible. That means no leaks, no condensation buildup, and no corrosion creeping into the wiring. Whether it’s rain, washdowns, or boat launches, this light is built to stay dry inside and keep working.

Simple Mounting for Clean Installs: Surface-Mount with Built-In Flange

Getting the light installed is straightforward thanks to its surface-mount design with a built-in black flange. You won’t need to cut large holes or mess with complicated brackets. Just line it up, mount it flush, and connect the wiring. The low-profile shape (only 7/8" deep) gives a neat finish that won’t snag on anything.

Straightforward Wiring: 4-Wire Pigtail with Bullet Connectors

Wiring is simple and secure with the included 4-wire pigtail that uses 0.180 male bullet connectors. Each wire handles its own function for stop, turn, tail, and backup lighting—so you can plug it in confidently without guessing. It keeps things tidy and makes replacements easy down the road if you ever need to swap one out.

Tough Enough for Daily Use: Durable Polycarbonate Build

The lens and housing are made of durable polycarbonate that resists impact and UV damage. It keeps the light looking clear and working right even after long-term outdoor exposure. DOT compliance ensures it meets proper safety standards, so you can count on solid performance wherever you tow.

Specs

Dimensions

  • Overall dimensions: 5-1/2" diameter x 7/8" deep

Weight

  • Weight: 0.26 lbs

Electrical

  • Voltage: 12V
  • Connector type: 0.180 male bullets

Lighting

  • Diodes: 14

Warranty

  • Warranty: Lifetime LED warranty

STL304MSDB Optronics LED Hardwired Trailer Light - Stop, Tail, Turn, Backup - Round - Red/Clear - 14 Diodes





Video of Optronics LED Hardwired Trailer Light - Stop, Tail, Turn, Backup - Round - Red/Clear - 14 Diodes
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Optronics Trailer Lights - Tail Lights - OPT66KB

Hi everyone. Steve here with etrailer.com. We're looking at an Optronics LED, hardwired trailer light stop tail turn and reverse in round with a red lens and clear lens in the middle. 14 dials. That's right, folks. So this round trailer light is gonna serve four different functions and we will go through them here in a second.

I want to kind of show you this, just you have an idea of what it looks like. You've got overall about five and a half inches diameter, 7/8 of an inch thick or deep, and you got 1, 2, 3 holes there for mounting it, and there's no hardware included, that's sold separately. Most likely, you already have some. And you have four of these bullet style connectors in the back. Now I've got two of them wired up right now.

So let's go ahead and shut off the overhead lights and take a look at everything here. So you have your basic running and then that's reverse. And then of course you have brake light and blinker if you need the blinker. And then I believe you can do all of 'em together. Yeah, so you have those options.

Again, five and a half inches diameter. Let's go ahead and put these lights back on and shut off this light so I can show you the back. So again, you have four wires out the back with the bullet style connectors, red, black, white, and brown. And on the back here in the plastic, I know it's kind of hard to see, but it does actually tell you in the molding which color does what. So it'll tell you which pattern and which color does what as far as those kind of things.

So very nice. They have the instructions already molded in the plastic. Very elegant, nice visible light. This is the Optronics LED hard wire. I'm Steven. Thanks for watching.

Customer Satisfaction Score:

Ratings & Reviews

4.6

5 reviews
Review sort icon
5-1/2" Round. Low-profile waterproof light serves 4 functions: brake, tail, turn, and backup light. Mounts on surface of trailer with built-in flange - hardware not included. 4-Wire pigtail with bullet connectors. 12 Diodes.

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These lights were perfect for the application I intended them for them! I've been getting a dune buggy ready for road-legal operation, and with these things, my motto has always been "less is best" for styling and function - therefore I needed a compact rear light that had all the bells and whistles (tail, turn, stop, & back-up lights). The LEDs are plenty bright for the job. If doing this sort of project with this style light, I recommend ALSO using the Roadmaster Brite-Lite 3-to-2 taillight converter (part# RM-732), sold by etrailer, to aid in making this compact taillight work as one unit. Great product!


5
5

See what our Experts say about this Optronics Trailer Lights


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Steven C
Installed by:
Steven C
Employee Wilson B
Updated by:
Wilson B
Employee Amanda K
Written by:
Amanda K

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