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

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

Part Number: STL101RB
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$21.54
Retail:$32.58
You Save: 34%
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Product Images

In Use/Installed

Customer Photos

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 in cutout with grommet (sold separately) and works with 3-prong plugs. Great Prices for the best trailer lights from Optronics. GloLight Halo LED Trailer Light - Brake, Turn, Tail - Submersible - Round - Red part number STL101RB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (442)
  • Q & A (0)
  • Photos

Optronics Trailer Lights - STL101RB

Highlights

  • One Light, 3 Functions: Outer ring glows for tail light, center brightens for brake and turn.
  • Reliable In Any Weather: Waterproof, sealed design keeps water out—ideal for boat trailers.
  • Fewer Replacements Needed: 21 LEDs draw just 0.145A tail / 0.375A stop-turn at 12.8V for long life.
  • Clean, Modern Look: Halo-style red lens gives a bright, even glow day or night.
  • Simple Power Hookup: Uses standard 3-prong PL-3 plug; works with A45PB or A47PB (sold separately).
  • Road Legal: Meets DOT, FMVSS 108, and CMVSS standards for compliant trailer lighting.

Features to know about

Better Visibility, Lower Power Draw: Bright LED Halo Design

This GloLight LED trailer light stands out with a unique halo ring that glows red for your tail light and a center section that brightens for brake and turn signals. The 21 built-in LEDs deliver crisp, even light that’s easy to see day or night while drawing just 0.145 amps for the tail function and 0.375 amps for stop and turn at 12.8 volts. You get strong, reliable illumination without putting strain on your power system.

Built to Handle the Elements: Waterproof and Submersible

No need to worry about rain or launching at the ramp—this light is fully sealed and submersible. Its polycarbonate housing and acrylic lens keep moisture out so the internal LEDs stay protected from corrosion. It’s tough enough for harsh use yet keeps its clean red glow every time you hit the brakes.

Clean Factory-Style Mounting: Recessed Fit with 4-1/2" Cutout

The round 4-5/16" diameter design installs neatly in a grommet (A45GB, sold separately) for a tight, professional look. It fits a 4-1/2" cutout, so if your trailer opening is 4-3/8", it’ll still slip in cleanly without extra modification. The PL-3 connector works with standard 3-prong pigtails (A45PB or A47PB, sold separately) for quick plug-in wiring.

Rear view of Optronics GloLight Halo LED Trailer Tail Light STL101RB showing standard 3-prong PL-3 plug connection for wiring installation.

Dependable LED Performance: Long Life and DOT Compliance

With no filaments to break and a lifetime warranty on the LEDs, this light is built to last. It meets DOT, FMVSS 108, and CMVSS standards, giving you the confidence that your lighting setup is compliant and road-ready wherever you travel.

Specs

Dimensions

  • Overall dimensions: 4-5/16" diameter x 2-3/16" thick
  • Light diameter: 4"

Dimensional diagram of Optronics GloLight Halo LED Trailer Tail Light STL101RB showing 4-5/16 inch diameter and 2-3/16 inch depth for recessed mount specifications.

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

  • LED warranty: Lifetime warranty on LEDs

STL101RB Optronics Glow Light LED Trailer Combination Tail Light - Stop,Turn,Tail - Waterproof- 21 Diodes - 4" Round - Red Lens - Standard PL3, 3-Prong Plug





Customer Satisfaction Score:

Ratings & Reviews

4.8

442 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 in cutout with grommet (sold separately) and works with 3-prong plugs.

by:

Easy to install. Look really slick. Awesome lights.



by:

They are installed on a VW dune buggy and have worked great so far!



by:

Nice and bright on the tow dolly



by:

These lights are just the look I was after for my Jeep. Not the run-of-the-mill, every day LED tail light.



by:

Great product. Very bright and love the halo with the led effect. Putting them on all of our trucks now.

Kelsey profile picture

Kelsey

1/30/2018

Lights are great. Still working and bright.



by:

Light looks great. Much brighter than the incandescent light I replaced. Would purchase this product again. Fast shipping.



by:

These have a clean look and come with what appear to be stainless screws and a gasket.



by:

Product was delivered on time and meets my expectations for quality. I would buy this again and from eTrailer because of their service.



by:

Replacements for my car dolly trailer. Great upgrade!



by:

It came. With no mounting bezel.

Heather A. profile picture
Etrailer Expert

Heather A.

5/27/2021

Thank you for your review. The light does not come with a bezel, the grommet is part # A45GB. You will also need the 3-wire pigtail part # A45PB.



by:

webpage easy to use. product is nice and good quality. shipping quickly in safe packaging. One problem--I ordered the wrong light, so I had to return it for another one!! Great customer service.



by:

Working well the trailer is parked out in the weather all year and the grommets are not hard of cracking



by:

etrailer as always has what I need, ships fast, and product is "as advertised"!
A pleasure to talk to the tech's when I have questions and even go as far as calling manufacturer to verify equipment selections.
Keep up the GREAT work.



by:

Great lights - easy install and they are very bright at night and great in the daylight. Outside circle serves as parking lights at night. Good purchase.



by:

These lights are better than I expected. Very bright and showy. I will never have to worry about someone running into the back of me because they didn't see my taillights!



by:

Just received the tail lamps. The weather is preventing me from installing them right now but I connected a power source to one of them to test the light. WOW are they bright!! The stop/ turn is very bright and will definitely work well once installed.
Great product and very good customer support. I am a satisfied customer.



by:

Although rubber gasket did fit into my 4 7/16" hole the LED tail light did not fit with gasket installed. I had to make my hole 4.5" and then I had to apply a lot of force to get the tail light installed into the rubber gasket.



by:

Here's the pic of my finished project. Thanks for ur help.



by:

I've installed Optronics LED stop/tail/turn lights on a previous truck. They held up extremely well. A large advantage of changing from incandescent to LED is people do see the signaling better. In this truck and the last one I owned, people have been more likely to share the road with me when merging into another lane. The GloLite feature isn't necessary, but quality LEDs are. Some LEDs aren't built that well; Optronics is very high quality and hold up extremely well under hard use and vibration.



by:

Great replacement taillights. Will be installing more of these in all our trucks. Thumbs up

Kelsey profile picture

Kelsey

10/11/2017

Liights are holding up very well. Still very bright. The Halo and LED combo is really cool. Everyone wants them in their truck now.



by:

Huge upgrade. Brighter, draw less power quality sealed unit. Brake turn signal is seperate from running light.

John S. profile picture

John S.

7/21/2018

Still look and work like the day I installed. Brighter safer smarter. I duck hunt so the trailers in and out of the salt water all winter. Everything fails in the saltwater these have not.



by:

Still working great over a year later. Perfect fit and well sealed from weather.



by:

Easy quick process. The company I work for purchased a clement monstar end dump trailer and it came with these tail lights in my opinion they are the best they can be seen at anytime of day and in most weather and a cool design. Ever since I discovered these lights they are the only kind I use on my trailer



by:

I have purchased scores of products online over the years, but this experience was by-far the best. Your website is well organized, well informed, and easy to navigate. The purchasing process went very smoothly, and the products that I purchased were competitively priced. The shipping and delivery was faster than estimated (and frankly, faster than I expected). The shipment arrived well packed, undamaged, and the contents were exactly as advertised. Thank you etrailer.com for a great experience...I'll be back to purchase again!



by:

These LED stop, turn, tail lights are an exceptional upgrade. They halo is a great feature and blinker lights are very bright! I truly believe these lights have made my unit safer!!!


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See what our Experts say about this Optronics Trailer Lights

  • Will GloLight LED Trailer Tail Light Fit Flange
    You didn't give any specifics so I can only assume you were referring to the GloLight LED Trailer Tail Light # STL101RB. This will not fit in a flange just the Rubber Grommet # A45GB.
    view full answer...
  • Compatibility of Optronics Trailer Tail Light # STL43RB With Trailer 4-1/2-Inch Opening
    The Optronics Trailer Light # STL43RB that you referenced can mount using rubber grommet # A45GB. But this light's overall diameter is 4-5/16-inches so this light unit would be too large to allow for grommet mounting in your trailer's 4-1/2-inch opening. However, my contact at Optronics confirmed that this mounting grommet # A45GB will fit a 4-1/2-inch rough opening and with it you can use the other light you referenced, part # STL101RB, which is 4-inches in diameter. If you need a wiring...
    view full answer...
    Image 1 for
  • LED Replacement for Peterson 420-15 Trailer Light
    I do have an option for you but the GloLight LED Trailer Tail Light part # STL101RB most likely won't fit into the mount you have welded to your trailer. The actual outside diameter of the light is 4.25". The recessed portion behind the lens on the base is around 3.80" which I think is what you are asking for so I went out to our warehouse to confirm this for you. If you need to replace the light you have now then you can use the Peterson Round Trailer Tail Light part # 431800 or part #...
    view full answer...
    Image 1 for
  • Replacement Taillights for Ranger FF3725 Boat Trailer
    I believe your trailer was originally equipped with Truck Lite model 30,40 or 44 taillights that could either be mounted into a grommet that would bring its overall diameter to just over 5-3/8 inches in diameter. I'll link you to the grommet and surface mounted round LED taillights we offer that are around 5 inches long. Hopefully you'll be able to visually match up the lamp. I'd still like to confirm exactly what you had, so sending a photo attached to an email reply would be very helpful....
    view full answer...
  • Glo Light Trailer Tail Light Installation With Grommet
    You will install the GloLight LED Trailer Tail Light - Stop,Turn,Tail - Submersible - 21 Diodes - Round - Red Lens # STL101RB after you install the grommet # A45GB in the bumper first. This ensures the mount is in place correctly and the light will then hold firmly in place.
    view full answer...
  • Replacement Round 4-1/4 Inch Grommet Mount Trailer Stop/Turn/Brake Lamps
    The closest lamp we offer to what you describe would be the Optronics # ST45RB. The lamp measures 4-1/4 inches in diameter at its largest, and the lamp installs into a 4-1/2 inch rough opening using the rubber grommet which is available separately as part # A45GB. If the 4.25 inch mounting diameter you refer to represents the diameter of the rough opening that the lamp installs in, this lamp will be a bit too large so you'd need to either enlarge the hole by 1/4 of an inch. The 3 pin plug...
    view full answer...
    Image 1 for
  • Does Trailer Light STL101RB Require Rubber Grommet to Install with A45SB
    You do not need to use a rubber grommet for the # STL101RB to install using the mounting flange part # A45SB which you also referenced. Those two parts together would be all that you need.
    view full answer...
  • Could Optronics GloLight Trailer Taillight STL101RB Be Wired for Stop/Turn/Tail Circuits
    The GloLight LED Trailer Tail Light # STL43RB you referenced can be used for the application you mentioned. It's a dual intensity light which means that the lower intensity would cover the running lights and the brighter one would cover the stop and turn circuits. There isn't a way to operate the ring around the outside of the light separately. You'd want the harness part # A45PB to install the light. White wire is for ground, black wire is for running lights and red would be for stop...
    view full answer...
  • Surface Mount Trailer Clearance Light Availability
    For what you are looking for a surface mount light like the part # STL43RBX would probably be a better option as it doesn't require a bracket and it does stick out a little bit.
    view full answer...
  • Is 2004 Subaru Forester Trailer Wiring Harness Strong Enough for Yakima Rack and Roller Trailer
    If your Yakima Rack and Roll trailer was made after October 2010 then that would mean it has LED lights on it. LED lights draw very little power compared to incandescent lights and using them and 2 additional lights are well within the abilities of the trailer wiring harness on your 2004 Subaru Forester Turbo. Even if the lights were not LED, the lights on older versions of the Rack and Roll trailers would likely not be enough power draw to be a problem, even considering adding 2 more...
    view full answer...
  • Replacement 4 inch GloLight Trailer Light Recommendation
    It sounds like you are looking for the GloLight Trailer Tail Light # STL101RB which is a 4 inch diameter GloLight trailer light. I attached a review video for you to check out as well.
    view full answer...
  • Enlarging 4-3/8 Inch Hole to 4-1/2 Inches for Optronics GloLight With Rubber Grommet
    The GloLight LED Trailer Tail Light - Stop,Turn,Tail - Submersible - 21 Diodes - Round - Red Lens # STL101RB along with the grommet # A45GB requires a 4-1/2 inch cutout. I recommend using a rotary tool like a Dremel or a manual metal file to evenly enlarge the holes to that size. I recommend drawing the hole side on the RV and then make sure to use fine sand paper or file so you don't take off more material than you desire.
    view full answer...
  • Will Optronics GloLight LED Tail Light # STL101RB and Grommet Fit 4-3/8 Inch Cutout
    The GloLight LED Trailer Tail Light # STL101RB referenced in your question, when used with the Rubber Grommet # A45GB, is designed to fit a 4-1/2 inch cutout on the trailer. Since your opening is just a tiny bit smaller at 4-3/8 inches, you should have no problem fitting the grommet on your trailer and you shouldn't have to make any additional modifications. I have attached a couple short video demonstrations on these products that you can also check out.
    view full answer...
  • Availability of Optronics LED GLOLight with Red Outer Ring and Amber LEDs in Center
    Optronics does offer a GLOLight that's amber in color, part # STL101AB. The outer ring functions as running lights and the center LEDs function as turn signals. It's hard to tell by the photo, but the LEDs in the # STL101RB lamp you referred to are all red. The outer ring functions as the running light, and gets brighter when the brakes are applied. The center section lights up for the brake and turn signal functions. We don't offer a lamp of this type with yellow or amber LEDs. If you'd...
    view full answer...

Do you have a question about this Trailer Light?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Zack K
Video Edited:
Zack K
Employee Andrew L
Video Edited:
Andrew L
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Tricia G
Written by:
Tricia G
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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