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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 # STL201RB
Our Price: $25.22
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Shipping Weight: 0.35 lbs
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STL201RB - Round Optronics Tail Lights
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4-5/16" Round. Waterproof light serves 4 functions: brake, tail, turn, and backup light. Red lens set inside clear lens. Recessed mount with grommet (sold separately). Accepts 2-prong plug for backup and 3-prong plug for tail light. 16 Diodes. Great Prices for the best trailer lights from Optronics. Fusion LED Trailer Tail Light - Stop, Tail, Turn, Backup - Submersible - Round - Red/Clear Lens part number STL201RB can be ordered online at or call 1-636-306-4830 for expert service.
  • All Info
  • Reviews (11)
  • Q & A (0)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - STL201RB

  • Tail Lights
  • Round
  • LED Light
  • Red and White
  • 4-1/2 Inch Diameter
  • Recessed Mount
  • Stop/Turn/Tail/Backup
  • Submersible Lights
  • Optronics

4-5/16" Round. Waterproof light serves 4 functions: brake, tail, turn, and backup light. Red lens set inside clear lens. Recessed mount with grommet (sold separately). Accepts 2-prong plug for backup and 3-prong plug for tail light. 16 Diodes.


  • Low-profile, round trailer tail light serves 4 functions
    • Stop light
    • Tail light
    • Turn signal light
    • Built-in backup light eliminates the need to cut holes in your trailer for 2 lights
  • Sonically sealed, waterproof housing and lens unit is submersible
  • 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 grommet and hardware (both sold separately)
    • Light fits into a 4-1/2" diameter hole
  • Accepts industry-standard plugs (sold separately)
    • 2-Prong plug for backup light function
    • 3-Prong plug for tail light functions
  • DOT compliant


  • Dimensions: 4-5/16" diameter x 1-5/8" deep
  • Diodes: 16
  • Power draw at 12.8 volts:
    • Stop/turn signal light: 0.265 amps
    • Tail light: 0.24 amps
    • Backup light: 0.3 amps
  • Warranty:
    • Lifetime on LEDs
    • 3-Year limited on housing

Optronics STL201X Series Fusion Gen II LED Combination Tail Light 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 is sonically sealed, which means that water will not get into the light and damage the diodes or circuit board.

Recessed-Mount Light

Recessed mount light

Recessed-mount trailer lights install underneath a housing or a grommet, which is often sold separately. These lights will extend into the mounting surface and require that a hole be cut into your trailer.

STL201XRB Optronics Fusion 4" Round Combination LED Boat Trailer Taillight w/ Built-in Reverse Light - 16 Diodes - Red/Clear Lens

Replaces STL201RB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Fusion LED Trailer Tail Light - Stop, Tail, Turn, Backup - Submersible - Round - Red/Clear Lens - STL201RB

Average Customer Rating:  4.9 out of 5 stars   (11 Customer Reviews)

4-5/16" Round. Waterproof light serves 4 functions: brake, tail, turn, and backup light. Red lens set inside clear lens. Recessed mount with grommet (sold separately). Accepts 2-prong plug for backup and 3-prong plug for tail light. 16 Diodes.


These are bright LED lights, and having the LED back-up light in the center makes hookup very easy. The only problem I had was mounting the STL201RB light in the A45GB rubber grommet with the BK45BB mounting bracket. I tried following the etrailer videos with no success--in fact I was pressing on the light so hard in an attempt to insert it in the rubber grommet and mounting bracket that I was afraid I would break the light. So I decided to try a different approach. I mounted the grommet in the bracket (easy part), then immersed that assembly into near boiling water for about 10-15 minutes. This softened the rubber grommet sufficiently such that inserting the LED light into the softened grommet was now very easy. I used heavy gloves while assembling it, and rubbed a bar of hand soap around the inside mounting surface of the grommet just before inserting the LED light. Really worked well---just need to take caution when handling the very hot bracket and grommet assembly right out of the hot water bath. The attached picture shows one of the LED light assemblies, with associated wiring, just prior to checking out the electrical hookups to make sure the wiring was done correctly. The other picture shows the round LED light along with a small red LED side marker light after installation.

These lights are really tough-one of the vertical PVC poles that they were mounted to came out of its holding fixture while on a highway trip-the light and the side marker light were drug along the roadway for about 100 yards before I realized what had happened and stopped. Amazingly, they continued to work great, just banged them up a bit!!! These lights are tough!!
RON S - 08/05/2018


I ordered the STL101RB Trailer Tail Light - Stop, Tail, Turn, Backup - LED to replace the standard tail lights on my Yamah Drive G19 golf cart. They replaced to stock ones perfectly as a neat way to add a backup lights for a custom feature. The backups led are actuated by the reverse switch on the dash.

It should be noted that the ground terminal on the two wire pigtail connection is not wired internally to the backup LEDs. They rely on the ground supplied by the three wire pigtail. Not a big deal, but worth noting. It throws a curve when bench testing.

These lamps add a nice custom touch!


Light arrived on time and as described.


These lights are awesome. They are brighter than the LED's that where in my truck and the built in back up lights are very bright also. No cutting wires, just plugged them in. I have photos but it won't let me down load them. 5 Stars. I will order from etrailer the next time I need lighting. Thanks again.


These were a great option for the limited space available on my trailer. I find myself pulling my trailer at night frequently, and I'm not sure how I made it so long without reverse lights.


Red lights woulda been cooler if they had cane with the grommets but either way they look and work great in my Jeep Tj.


Item arrived in as described condition, packaged well and order complete. It's going to make a nice finish to my CJ7 project.


they work great for the project im buil ding


Love them


Just what my Husband wanted! Thank you




See what our Experts say about this Optronics Trailer Lights

  • What Happens to Trailer Taillights When the Turn Signal and Brakes are Used at the Same Time
    When using your turn signal while braking, a trailer light like the Fusion LED Trailer Tail Light # STL201RB will continue to flash with the blinker while the brakes are applied. The blinker will override the brake, otherwise every time you used the brakes while turning you would lose the turn signal and no longer indicate to other drivers that you were turning.
    view full answer...
  • Does Tail Light STL201RB Have An Integrated Rear Reflector?
    The Trailer Tail Light - LED - Submersible # STL201RB does not have the rear reflector according to my tech contact at the manufacturer. It is not required to be integrated although many tail lights are. It is required to have a rear reflector if the tail lights are not reflective like # RE13RB. I've attached an article to further assist with trailer lighting regulations, but let me know if your have further questions as we don't directly address everything and you asked a very good...
    view full answer...
  • Grommet for Optronics 4 Inch Round Recessed Mount Trailer Lights
    For the Optronics Trailer Tail Light - Stop, Tail, Turn, Backup - LED # STL201RB, you will want the Rubber Grommet for 4" Round Trailer Tail Lights # A45GB.
    view full answer...
  • Recommended Brightest 3-4 Inch Round LED Backup Light that is DOT Certified
    I can help you figure out what reverse lights are going to be the brightest. The brightest reverse light is going to be the Optronics GloLight # BUL101CB. This 4 inch round backup light will have 326.4 Lumens, is DOT certified for a backup light function in a 2-lamp system when a pair of lights is installed. For a combined reverse and tail light, I recommend the Optronics # STL201RB. This 4-5/16 inch round light will have a reverse light with 230.4 Lumens. This light is also DOT compliant. I...
    view full answer...
  • Availability of Orange/Amber Clearance Light
    We have a great selection of clearance lights that you can choose from for your application. I have attached a link to our selection of Amber (or Orange) lights that you can filter through. The closest size that we have Fusion LED Trailer Tail Light # STL201RB that you were looking at is the LED Clearance or Side Marker Light w/ Reflector and Locking Clip # MCL002AXB which has a 3-3/8" diameter mounting area. The light itself has a 2-5/16" diameter.
    view full answer...
  • 4 Inch Round Tail Lights with Reflective Lens
    I do have an option for you but the Fusion LED Trailer Tail Light part # STL201RB does not have a reflective lens. I looked through all of our other 4" round tail lights and none of the ones with the included reverse light have a reflective lens. Therefore, the best option we can offer you is to separate the tail light and reverse light housing with the LED Trailer Stop/Turn/Tail Light part # STL43RBX and LED Trailer Backup Light part # BUL11CBX. These are both 4" round LED lights with...
    view full answer...
  • Grommet Recommendation for Optronics 4 inch Clearance Light # STL201RB
    The correct grommet for the Optronics light part # STL201RB is the part # A45GB. For a similar amber light we have the # STL101AB which would be a great option but not an exact match.
    view full answer...

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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Cole B
Installed by:
Cole B
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Written by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Noah M
Updated by:
Noah M

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