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Fusion LED Trailer Tail Light - Stop, Tail, Turn, Backup - Submersible - Round - Red/Clear Lens

Fusion LED Trailer Tail Light - Stop, Tail, Turn, Backup - Submersible - Round - Red/Clear Lens

Item # STL201RFMB
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Optronics Trailer Lights - STL201RFMB
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4" Round. Waterproof trailer light serves 4 functions: brake, tail, turn, and backup light. Red lens set inside clear lens. Recessed mount with built-in flange. Accepts 2-prong plug for backup and 3-prong plug for tail light. 24 Diodes. Lowest Prices for the best trailer lights from Optronics. Fusion LED Trailer Tail Light - Stop, Tail, Turn, Backup - Submersible - Round - Red/Clear Lens part number STL201RFMB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (8)
  • Q & A (10)
  • Videos (3)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - STL201RFMB

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

4" Round. Waterproof trailer light serves 4 functions: brake, tail, turn, and backup light. Red lens set inside clear lens. Recessed mount with built-in flange. Accepts 2-prong plug for backup and 3-prong plug for tail light. 24 Diodes.


  • Round trailer tail light with smooth, bright red outer band serves 4 functions
    • Stop light - outer band of light brightens and center LEDs illuminate
    • Tail light - outer band lights up
    • Turn signal light - inner ring of LEDs flashes
    • Backup light - center LEDs light up
  • GloLight lens creates a solid circle of light with a smooth appearance
  • 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 for improved heat distribution
  • 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
  • Durable polycarbonate lens and housing
  • Red lens set inside white lens with red and white LEDs
    • Red lens with red LEDs for tail light
    • Clear lens with white LEDs for backup light
  • Recessed mount with built-in black flange - hardware not included
  • Accepts industry-standard plugs (sold separately)
    • 2-Prong plug (A42PMB - sold separately) for backup light function
    • 3-Prong plug (A45PMB - sold separately) for tail light functions
  • DOT compliant
    • Meets FMVSS 108 requirements for automotive lighting


  • Overall dimensions with flange: 5-1/2" diameter x 1-5/8" deep
    • Light face diameter: 4"
  • Diodes: 24
  • Power draw at 12.8 volts:
    • Stop/turn signal light: 0.316 amps
    • Tail light: 0.15 amps
    • Backup light: 0.3 amps
  • Lifetime LED warranty on LEDs

Optronics STL201RFMB LED M1 Series Millennium Series Sealed LED Clearance Diagram

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.

Weathertight Connection

Optronics Weathertight Connection

This light has 2 weathertight connections as pictured above - one for the tail light functions and one for the backup light. Weathertight plugs (A42PMB and A45PMB - sold separately) are designed to help connections block out moisture.

STL201RFMB Optronics Glo Light Fusion 4" Round Combination LED Trailer Taillight - Red/Clear Lens - Weathertight Plug - Black Flange

Video of Fusion LED Trailer Tail Light - Stop, Tail, Turn, Backup - Submersible - Round - Red/Clear 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 Reviews

Fusion LED Trailer Tail Light - Stop, Tail, Turn, Backup - Submersible - Round - Red/Clear Lens - STL201RFMB

Average Customer Rating:  4.9 out of 5 stars   (8 Customer Reviews)

4" Round. Waterproof trailer light serves 4 functions: brake, tail, turn, and backup light. Red lens set inside clear lens. Recessed mount with built-in flange. Accepts 2-prong plug for backup and 3-prong plug for tail light. 24 Diodes.


Lights were exactly what I wanted very bright and great quality shipping was way faster than expected 565292


excellent product, installed them in my jeep TJ , love em.. sorry no pics. 483940


I love the lights and the website so far but it bugs me that the lights didn't come with the plug pigtails. You shout raise the price of the light by whatever the cost would be for 1 and throw the other in for free or just throw them in for free . It's really nice to have them as a kit. Kits are key. 430358


Great fit, excellent delivery time. 413839


Great product, came as described. 381762


great product 344247


Nice i like it, good products , excellent parts!! 340893


PROS Nice Bright light. All Functions work well. CONS, would be nice if it came with a mounting gasket & the wiring weather tight plug-in pigtail needed to complete the wiring. Love the LED brightness just wish it came more complete ...plug & play. 315954


Ask the Experts about this Optronics Trailer Lights

  • Which Pigtails Are Needed For The GloLight LED Trailer Light STL201RFMB?
    Yes, the Optronics GloLight LED Trailer Tail Light - Stop, Tail, Turn, Backup - Submersible - 24 Diodes - Weathertight, # STL201RFMB, uses two weathertight harnesses. The 3-Wire Pigtail for Optronics Trailer Lights - Weathertight Plug - 10" Lead, # A45PMB, will give you the running light, stop light, and turn signal funtions. The 2-Wire Pigtail for Optronics Lights - Weathertight Plug - 10" Lead, # A42PMB, will give you the backup light funtion. To connect these harnesses, I suggest...
    view full answer...
  • Clearance Needed to Install LED Trailer Light # STL201RFMB
    I went to our warehouse and put together the light, part # STL201RFMB, with both the 3-wire, part # A45PMB, and 2-wire, part # A42PMB, pigtails. With both pigtails plugged in I measured abouut 2-1/4 inches from the front of the light to where the wires enter the connector. You need a little more space than this for the wires to have room to bend so I'd guess you want at least 2-1/2 inches at the very least.
    view full answer...
  • Looking for STL201 Series GloLight 4 Inch LED Flange Mount Combination Stop/Turn/Tail/Back-Up Lights
    I have exactly what you are looking for, # STL201RFMB. This light is DOT-compliant, offers sonically sealed weathertight connections, and has a recessed flange mount design for secure installation.
    view full answer...
  • Function of Optronics GloLight LED Stop Turn Tail Backup Light # STL201RFMB
    I went out to the warehouse and pulled the Optronics # STL201RFMB light to test it out and see for you. I found that when you have the running lights on that the LED ring glows constantly. When you press the brake, the red LEDs and the red LED ring will be illuminated. If you were to turn on your blinker the ring would remain illuminated but only the red LEDs in the inner center ring will flash. There is also white reverse LEDs that will come on when backing up. The color of the...
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  • Diodes of Fusion LED Trailer Tail Light
    The Fusion LED Trailer Tail Light # STL201RFMB is an LED with 24 diodes; it is a single light fixture that can function as a stop light, turn signal, tail light and backup light. This is one of the best LED trailer lights available due to its 24 diodes for optimum brightness; they also come with a lifetime warranty. The Fusion LED Trailer Light # STL201RFMB will require the use of both the 2-Wire Pigtail for Optronics Lights - Weathertight Plug # A42PMB and 3-Wire Pigtail for Optronics...
    view full answer...
  • Distance Between Mounting Holes of GloLight Clearance # STL201RFMB
    The distance between the mounting hole centers of the GloLight LED Trailer Tail Light # STL201RFMB that you referenced is 4-1/4 inches.
    view full answer...
  • What Size Hole is Required to Install GloLight LED Trailer Tail Light # STL201RFMB
    To install the GloLight LED Trailer Tail Light # STL201RFMB that you referenced you would need to have a 4.5 inch hole cut in the trailer. The light portion of the assembly is 4.5 inches which would recess into the hole and the flange has an outer diameter of 5-1/2 inches.
    view full answer...
  • Installing a 2-Wire Combined Trailer Light on a Vehicle with 3-Wire Separate Wiring
    It sounds like you're trying to use trailer tail light, part # STL201RFMB, which is a 2-wire system on a vehicle that has 3-wire separate wiring. The light is designed as a trailer light, and trailers generally use 2-wire lights but the light can work on a vehicle with separate lighting if wired correctly using a converter. You need a converter like the Roadmaster Brite-Lite, part # RM-732, to combine the turn signal and brake light circuits on your vehicle. Connect your vehicle's...
    view full answer...
  • Availability of Reverse LED Trailer Lights
    We do offer a wide selection of LED reverse lights, though they are available individually as opposed to being included in a kit. You can select whichever size and shape best fits your needs; for example there is the Optronics # STL68RB, which is oval and measures 10-1/8" x 3-1/16". There is also the option of a circular light such as Optronics # STL201RFMB or rectangular Bargman # 47-84-008. I've added links to video reviews of these lights, as well as a link to our page with the entire...
    view full answer...
  • LED-Type White Trailer Backup Light for Bass Tracker Trailer
    We do offer LED-type trailer lights with backup lights included, such as # STL211RB and # STL201RFMB, but none in the size/shape of # STL15RB. However, I can offer you an alternative. For a really bright and useful white LED backup light for your trailer you might want to consider a separate light such as the Optronics 42-diode surface-mount # BUL90CB. This 7-inch diameter round light will let you almost get a tan too if you want! Simple 2-wire connection to your reverse light circuit...
    view full answer...

Do you have a question about this Trailer Light?

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Info for this part was:

Expert Research:
Jameson C
Written by:
Laura H
Installed by:
Cole B
Updated by:
Amy B
Updated by:
Brian T
Video Edited:
Chris R

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