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GloLight LED Trailer Tail Light - Stop,Turn,Tail - Submersible - 21 Diodes - Round - Red Lens

GloLight LED Trailer Tail Light - Stop,Turn,Tail - Submersible - 21 Diodes - Round - Red Lens

Item # STL101RFB
Our Price: $26.05
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Shipping Weight: 0.43 lbs
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GloLight LED Trailer Tail Light - Stop,Turn,Tail - Submersible - 21 Diodes - Round - Red Lens LED Light STL101RFB
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5-1/2" Diameter x 1-1/2". 3-Function, waterproof light acts as brake, tail, and turn light. GloLight lens creates a solid panel of light. Surface mount with built-in flange. Accepts industry-standard 3-prong plug. Great Prices for the best trailer lights from Optronics. GloLight LED Trailer Tail Light - Stop,Turn,Tail - Submersible - 21 Diodes - Round - Red Lens part number STL101RFB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (1156)
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  • Why etrailer?

Optronics Trailer Lights - STL101RFB

  • Tail Lights
  • Round
  • LED Light
  • Red
  • 4 Inch Diameter
  • Recessed Mount
  • Stop/Turn/Tail
  • Submersible Lights
  • Optronics

5-1/2" Diameter x 1-1/2". 3-Function, waterproof light acts as brake, tail, and turn light. GloLight lens creates a solid panel of light. Surface mount with built-in flange. Accepts industry-standard 3-prong plug.


  • Round trailer tail light serves 3 functions
    • Turn signal light
    • Tail light
    • Brake light
  • GloLight lens creates a solid light pattern with a smooth appearance
    • Outer band of LEDs functions as tail light
    • Center red LEDs act as turn signal and brake light
  • Sonically sealed, waterproof housing and lens unit is submersible
  • Durable surface-mount technology (SMT) construction of LED circuit board
    • Better withstands shock and vibration
    • Allows improved heat distribution and thinner construction
  • LEDs make great replacements for incandescent lights
    • Last 50 times longer
    • More efficient - provide brighter light with less power output
    • No bulbs to replace - no brittle filaments
  • Red lens over white LEDs
  • Polycarbonate housing and tinted acrylic lens
  • Surface mount with built-in flange - hardware not included
    • Requires 4-1/2" hole in trailer for flange to sit flush
  • Accepts industry-standard 3-prong plug (sold separately)
  • DOT compliant
    • Meets FMVSS 108 and CMVSS requirements for automotive lighting


  • Quantity: 1 combination tail light
  • Overall dimensions: 5-1/2" diameter x 1-1/2" deep
    • Light face diameter: 4"
  • Diodes: 21
  • Power draw at 12.8 volts:
    • Tail light: 0.145 amps
    • Stop/turn light: 0.375 amps
  • Lifetime warranty on LEDs

Optronics STL101RFB GloLight Red LED Trailer Tail Light Dimensional Diagram

Innovative GloLight Design

Optronics Glow lights fully lit around the edge

This red LED light serves as a trailer tail light with stop, turn, and tail functions. The light gives your truck or trailer a distinctive look that's completely street legal. This Optronics GloLight has a unique solid light pattern when lit, so your lights stand out from the rest. Optronics GloLights are a great way to add both style and value to your truck or trailer.

Sonically Sealed, Waterproof Trailer Light

The waterproof construction of this light makes it ideal for use on trailers that may be submerged, like a boat trailer. The housing and lens are sonically sealed together to create a single unit, which means that water will not get into the light and damage the diodes or circuit board.

LEDs vs. Incandescent Lights

The long-lasting, cool-burning LEDs make this light the perfect replacement for incandescent vehicle and trailer lighting. LED lights are more efficient, use less power, and last much longer than incandescent lights.

Surface Mount Technology

The surface-mount technology used to construct these lights protects the LEDs from shock and vibration better than through-hole technology because the diodes are soldered directly to the surface of a printed circuit board instead of attached with wires that run through holes in the board. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability, and durability.

PL-3 Wiring Connection

Back of Optronics Glow light showing standard 3-prong plug mount

This GloLight has a standard 3-prong plug as pictured above. A 3-prong pigtail adapter (A45PB or A47PB - sold separately) is required to connect this light to your vehicle or trailer. The built-in polycarbonate mounting flange makes it easy to install the light on your trailer. Three screws (not included) are required.

Surface-Mount Light

Surface mount light

Surface-mount lights install flat against the surface of the trailer, so a hole does not need to be cut into the trailer for the light. This type of light is installed using a flange or bracket that has mounting holes. And mounting hardware is used to secure the light to the trailer.

STL101RFB Optronics Glow Light LED Trailer Combination Clearance or Side Marker Light - Submersible - 9 Diodes - Round - Red Lens - Standard PL3, 3-Prong Plug

California residents: click here

Video of GloLight LED Trailer Tail Light - Stop,Turn,Tail - Submersible - 21 Diodes - Round - Red Lens

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Optronics GloLight Trailer Lights Manufacturer Review

Brett Johnson: (silence)The Glolight is the stunning combination of premier lighting technology, meeting world-class style and capabilities. The introduction of the Glolight series represents the first truly different approach in years to the visual presentation of stop-tail-turn lamps.Most LED lamps have hotspots or patterns of bright light. Glolight lamps are visually distinctive from other LED lamps, because their lenses diffuse the light, giving them a smooth, bright, glowing appearance.The Glolight optical technology is so different, it's patentable. And Optronics has 35 new products with Glolight technology in its pipeline, right now. Mudd: Lighting is one of the most visibly predominant features on any vehicle, and this is a completely different looking yet highly effective light. We're focused on integrating the latest technology into our manufacturing process, and these new lights clearly represent the innovative partnership between Vanguard and Optronics.

Innovation is important to Vanguard, our customers, and our industry. Robert: Glolight technology looks different because it is different. Different in its optical approach and different all the way down to the circuit boards.We designed and manufactured all of our lamps using the most advanced engineering techniques, and test them in our own world-class, state-of-the-art optical testing facility. Lamps are engineered to resist everything, from shock, to dust, to high-velocity water spray. We're committed to designing and manufacturing erosion-resistant LED lighting products.

And Glolight lamps are produced using solid state, surface-mount device, or SMD, technology.Most LED lamps sold in the heavy duty market today, use what is typically referred to as "through hole" construction. Optronics LEDs are mounted directly to the surface of the circuit board, eliminating exposure to connecting points. LED lamps with SMD technology, like Optronics' new Glolight, are so robust that they can continue to function even if their circuit board is completely submerged in water. The unique Glolight lenses and housings are made of tough polycarbonate material that is sonically welded to create an impermeable seal. Glolight lamps meet all FMVSS 108 and SAE photometric requirements for visibility and safety.

And our lamps are tested at a certified, independent laboratory.I guess it's redundant to say this, but our lamps come with a lifetime warranty. Roush: There's nothing out there that's as eye-catching and effective as these Glolight lamps. Vanguard is always drawn to component supplier products that contribute to our customers' efforts to operate more effectively and safely. Glolight lamps just look different and more noticeable. And that means better safety.

Brett Johnson: With world-class manufacturing facilities, harness making capabilities, and a global market presence, Optronics is now changing the competitive landscape in HD lighting. We always have access to a lighting manufacturer with global sophistication, fleets are enjoying increased product availability, and everyone is befitting from new, innovative technology and the industry's most competitive pricing structure. With Glolight, Optronics is sending a signal that things have changed in the HD lighting industry.

Customer Satisfaction Score:

Customer Reviews

GloLight LED Trailer Tail Light - Stop,Turn,Tail - Submersible - 21 Diodes - Round - Red Lens - STL101RFB

Average Customer Rating:  4.8 out of 5 stars   (1156 Customer Reviews)

5-1/2" Diameter x 1-1/2". 3-Function, waterproof light acts as brake, tail, and turn light. GloLight lens creates a solid panel of light. Surface mount with built-in flange. Accepts industry-standard 3-prong plug.


I like the Sets of Lights I got from you very much. I put them in my '53 International Pickup I was restoring. I attached some pictures. Feel free to use them for advertising/promoting. Thanks.


Lori b very helpful got me all the right lights. Thx so much.


Put on customers trailer he's not returned to complain so they must work. Have the same on my tow dolly and they've lasted 8 yrs.


good company to find harder to find tail lights. only ding is they didnt package mine real good only put paper stuffing on top not on bottom or sides did cause some scratching on lens. other than that it would be 5 stars.


Looks great.


etrailer extremely helpful & knowledgeable about the products they sell. very good about getting them to you . will order from Katie at etrailer again.


I needed to replace boat trailer light for a tournament. The product was easy to find and the shipment got to me sooner than expected. I will definitely use etrailer for all of my needs.


Great product and direct replacement!


Great product. It is worth the price for a very well made and unique looking unit. I prefer these lights with the flange installation over the standard rubber grommet type installation. They are much more secure. Great website with extensive specifications and photos let me choose exactly what I needed. A+++


Exact replacement for tail lamps on a R angertrailer


Great quality very bright and extremely pleased with product. Very slim design will fit perfectly for my camper rebuild...can't beat the LED's


Product was exact replacement needed at a reasonable price and arrived when expected.


Work Great.




Fast delivery and you get what you purc hased.


Great product fast delivery time


All parts were recieved in good conditi on.





Review from a similar GloLight in Trailer Lights

If you’re going to sell lights you should also sell the wiring harness along with it I almost couldn’t use the lights but got lucky and found the wiring harness.

As mentioned in the product description above, the # AL45PWTB
Three-Wire Straight Pigtail for Optronics Weatherproof Stop/Turn/Tail
wiring pigtail is available separately.
-- Etrailer Expert Mike L - 10/13/2022


Review from a similar GloLight in Trailer Lights

They look nice. When off the light matches the halo brake and tail light.


Review from a similar GloLight in Trailer Lights

These are being installed in the trailer I pull behind my motorcycle. They broadcast a nice get your attention lighting up a brilliant turn signal light.

I love the GloLight led trailer lights. They look awesome and function perfect. I bought the trailer as a gutted shell and built it from there to a better than new trailer. Every light on the trailer had to be clear lens and have a specific look before I would purchase, and I dont have a single regret with these lights.
Squirrel - 10/23/2022


Review from a similar GloLight in Trailer Lights

a year after my purchase trailer is checking in to see if Im still happy with my purchase. Im am for the first time ever Ive gone a whole year without having trouble backing my boat and trailer into seawater and having trouble with my trailer lights.THANK YOU etrailer!!!!!


Review from a similar GloLight in Trailer Lights

The Igor worked great. I had a heck of a time trying to order lights for the trailer - either not getting the ones I intended getting or mismatched lights. But you came through like me a champ. Thanks.


Review from a similar GloLight in Trailer Lights

This one is for the “driver” side. It has the lens on the bottom for lighting the license plate. (It does not include the license plate holder. I like this one because you just push in the wires. I recommend this light.

No worries
Theodore - 02/20/2021

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Availability of a Red Version of the LED Utility Light # UCL60CB
    The closest thing we have to the LED Utility Light # UCL60CB in red would be the Optronics GLOLight LED Light # STL101RFB. It is 4 inches in diameter has a red lens and is LED. We don't offer anything in green so the # UCL60CB would be your best option there. Also, these lights aren't altitude rated.
    view full answer...
  • Is the Optronics 21 Diode LED Trailer Taillight the Brightest
    Since Optronics does not share information such as lumens, determining the brightness can be difficult to determine. Although not always the case, typically more diodes indicates that the light will be brighter. The # STL23RB Optronics LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 21 Diodes - Round - Red Lens still has the most at 21 diodes which will make it one of, if not the most, bright red 4" stop, tail, turn lights. The only other 4" red light with as many diodes is...
    view full answer...
  • Available Sizes of Round Trailer Tail Lights
    We do not have an exact 2-1/2-inch match to the GloLight LED Trailer Tail Light # STL101RFB which has a 4-inch lens diameter and an overall diameter of 5-1/2-inches but we do offer other a lot of roughly similar round red lights, both LED and incandescent, that you can see on the linked page. GloLight LED Trailer Tail Light # STL101RFB is a recessed-mount type that requires a mounting hole, but among the other options are that type as well as pedestal-mount lights like incandescent model...
    view full answer...

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Info for this part was:

Employee Tricia G
Written by:
Tricia G
Employee Adele M
Updated by:
Adele M
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Adam R
Expert Research:
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Employee Chris R
Video Edited:
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