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GloLight Halo LED Trailer Light w/ Flange - Brake, Turn, Tail - Submersible - Round - Red
Optronics

GloLight Halo LED Trailer Light w/ Flange - Brake, Turn, Tail - Submersible - Round - Red

Part Number: STL101RFMB
In Stock
$32.94
Retail:$46.47
You Save: 29%
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This red GloLight is bright, easy to see, waterproof, and just looks cool. The outer ring is a tail light and the center is a turn signal and brake light. Mounts with built-in flange. Designed with weathertight connector. Great Prices for the best trailer lights from Optronics. GloLight Halo LED Trailer Light w/ Flange - Brake, Turn, Tail - Submersible - Round - Red part number STL101RFMB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - STL101RFMB

Highlights

  • One Light, 3 Functions: Outer ring glows for tail, center brightens for brake and turn signals.
  • Reliable In Any Weather: Waterproof, sealed design keeps moisture out for long life.
  • Bright, Efficient LEDs: 21 diodes use less power (0.145A tail / 0.375A stop-turn at 12.8V).
  • Simple, Secure Mounting: Built-in flange fits a 4-1/2" cutout for an easy recessed install.
  • Lasting Durability: Polycarbonate housing and acrylic lens resist impact and wear.
  • Road Legal: Meets DOT, FMVSS 108, and CMVSS standards for safe, compliant lighting.

Features to know about

Brighter Lighting and Cleaner Look: GloLight Halo LED Design

Traditional bulbs can look dated and fade fast, but this GloLight red LED brings a crisp, modern glow that stands out day or night. The outer halo ring works as the tail light while the center handles the brake and turn signals for an even, balanced shine. With 21 LEDs behind a red acrylic lens, it’s both eye-catching and efficient—drawing just 0.145 amps for the tail light and 0.375 amps for stop/turn at 12.8 volts. The result is a bright, easy-to-see light that uses less power and lasts longer than old incandescent setups.

No More Water Worries: Fully Submersible, Sealed Construction

Wet roads, rain, or launching into the lake won’t slow this light down. It’s built to be completely waterproof with a sealed polycarbonate housing that keeps moisture out and performance steady. That makes it a solid choice for trailers that see water or rough conditions where corrosion usually wins. You get long-term reliability without dealing with fogged lenses or damaged wiring after a dunking.

Simple, Solid Mounting: Recessed Fit with Built-In Flange

Getting the light mounted cleanly is straightforward thanks to the integrated flange design. It’s made to fit a 4-1/2" cutout and sits flush once in place for a tidy finish. The overall diameter is 5-1/2", with a 4-5/16" light face that lines up perfectly in common round recesses. There’s no extra drilling or trimming needed—just a snug, factory-style fit that stays put.

Reliable Connections: Weathertight Plug System

Electrical issues from bad connectors are no fun, so this one uses a weathertight plug that seals tight against moisture and dirt. It connects with adapter part #AL45PWTB (sold separately) if you’re running older three-prong setups, or directly with the 3-wire pigtail #A45PMB (sold separately). That secure fit means consistent power to your LEDs and fewer wiring headaches down the road.

Rear view of Optronics GloLight Halo LED trailer light showing weatherproof three-prong connector and flange mount

Built for Long Service: DOT and CMVSS Compliant LEDs

This GloLight meets DOT, FMVSS 108, and CMVSS standards for safety, so you know it’s built right. LEDs come backed by a lifetime warranty, delivering bright illumination every time you hit the brakes or signal—no bulb changes needed, just dependable lighting ready for years of use.

Specs

Dimensions

  • Overall dimensions: 5-1/2" diameter x 1-1/2" thick
  • Light face diameter: 4-5/16"
  • Cutout required: 4-1/2"

Dimensional diagram of Optronics GloLight Halo red LED trailer light showing diameter, flange, and cutout measurements

Electrical

  • Power draw at 12.8 volts (Tail light): 0.145 amps
  • Power draw at 12.8 volts (Stop/turn light): 0.375 amps

Lighting

  • Diodes: 21

Warranty

  • LEDs: Lifetime warranty

STL101RFMB Optronics Glow Light LED Trailer Combination Tail Light - Stop,Turn,Tail - Waterproof - 21 Diodes - 4" Round - Red Lens - Weatherproof 3-Prong Plug





Customer Satisfaction Score:

Ratings & Reviews

4.8

441 reviews
Review sort icon
This red GloLight is bright, easy to see, waterproof, and just looks cool. The outer ring is a tail light and the center is a turn signal and brake light. Mounts with built-in flange. Designed with weathertight connector.

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I like these lights. They appear to be bright in the daylight. Can't ask for me. My trailer is from 1997 and they just plugged into the existing wiring.



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VERY TIMELY



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nice product, good price, fast delivery,thumbs up



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Love your products , this my third orde r!



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I like the lites



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These lights are awesome! Glad I made this purchase. What a difference!



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Good quality light at a great price, very helpful staff when ordering



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Always a pleasure doing business with etrailer. I can get these where I work for cost +xx but they're cheaper from etrailer. Always have excellent prices.



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Worked as expected. High quality product. Needed a bright light and this one delivers. Love the halo effect.
Makes our horse trailer light up like a Christmas tree at night.



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Nice bright center 6 LEDs. Glow effect for running lights looks awesome especially when you have every light a glo light gives a more custom look.



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Ordering From etrailer was a great Experience. Pat was very helpful over the phone when I called to ask questions about a set of lights I was interested in and even helped me place my order.

Shipping was fast and everything they shipped was in flawless condition.
My lights and harnesses are still going strong.

Thank you!



by:

Always a pleasure to deal with the people at each etrailer 100percent professional



by:

Thanks for the great lights! I will be ordering another set of ambers for a dust light while on the trails.


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See what our Experts say about this Optronics Trailer Lights

  • How to Determine Replacement Tail Light for 2004 Ranger Boat Trailer
    From what I could find it looks like a 2004 Ranger boat trailer uses round tail lights so something like the Optronics GloLight LED Trailer Tail Light # STL101RFMB could potentially work. Since I don't have specs on your tail lights though I'll need you to confirm the dimensions of your trailer tail lights prior to getting a replacement. The light I mentioned above has an overall diameter of 5-1/2" and the light itself has a 4-5/16" diameter. If you have something different please let...
    view full answer...
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  • What are the Dimensions of the Different Steps on the Back of Optronics Trailer GloLight STL101RFMB
    I went out to the warehouse and pulled Optronics trailer light # STL101RFMB to measure it for you. That bottom tier is actually closer to 4-7/16 inches (4.44) and it is 3/16 inches tall. The next one up is 3.95 inches in diameter, which might as well be 4 inches, and it is 3/16 inches tall. The last tier is 3.79 inches (3-3/4) in diameter and 3/8 inches tall. The plug at the top is 1 inch wide, 1/2 inch front to back, and 7/16 inches tall.
    view full answer...
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  • Diameter of Optronics # STL101RFMB GLOLight LED Stop/Turn/Taillight
    The 4 inch diameter listed is for the lens, while the entire diameter of the unit, including the mounting flange is 5-1/2 inches. The lamp is designed to fit in a 4-1/2 inch diameter hole. If installed in a 4 inch hole, the mounting flange would not be flush against the mounting surface. If you could enlarge the hole by 1/2 an inch, the lamp would work great for you. All of the flush or grommet mounted 4 inch trailer lights we offer require a 4-1/2 inch hole.
    view full answer...
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  • Which Pigtail Is Correct For The Optronics GloLight Taillight STL101RFMB?
    The Weathertight connection on the back of the GloLight LED Trailer Tail Light # STL101RFMB is a newer design from Optronics, so the Three-Wire Straight Pigtail # AL45PWTB is an adapter for the older 3 prong design that is still pretty commonly used on older lights and other manufacturers (see part # A45PB). With that said, as you do not have a need for this adapter, you will indeed need the 3-Wire Pigtail - Weathertight Plug # A45PMB.
    view full answer...
  • Availability of a Flush Mounted 2-1/2 inch Diameter GLO Light Led Trailer Light
    The Optronics GloLight # MCL157RB that you referenced is designed to be recess mounted with the Recess Flange # A57GB. While it wouldn't quite be as flush mounted as the Optronics GLOLight LED Stop/Turn/Tail Light # STL101RFMB that you also have it would look pretty good on your trailer. For a very similar 2-1/2 inch LED light that is designed to be flush mounted check out the # MC57RB. For a flush mounted grommet you would want part # A55GB.
    view full answer...
  • Availability of a Optronics GLOLight LED Stop/Turn/Tail Light
    Sounds like you are looking for the Optronics GLOLight LED Stop/Turn/Tail Light # STL101RFMB which we do carry. I attached a review video for you to check out as well.
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Tricia G
Written by:
Tricia G
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Amanda K
Updated by:
Amanda K

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