LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 4 Diodes - Round - Red Lens - Weathertight

LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 4 Diodes - Round - Red Lens - Weathertight

Item # STL413RMB

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STL413RMB - Round Optronics Trailer Lights
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4-5/16" Round. Waterproof trailer light serves 3 functions: brake, tail, and turn. Recessed mount with grommet (sold separately). Weathertight plug. 4 LEDs. Red lens. Lowest Prices for the best trailer lights from Optronics. LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 4 Diodes - Round - Red Lens - Weathertight part number STL413RMB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Optronics Trailer Lights - STL413RMB

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

4-5/16" Round. Waterproof trailer light serves 3 functions: brake, tail, and turn. Recessed mount with grommet (sold separately). Weathertight plug. 4 LEDs. Red lens.


  • Round trailer tail light serves 3 functions
    • Stop light
    • Tail light
    • Turn signal light
  • 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
  • Polycarbonate lens and housing
  • Red lens
  • Recessed mount with grommet (sold separately)
  • Weathertight connection point on back of light requires adapter (AL45PWTB - sold separately) to work with industry-standard 3-prong plugs
  • DOT compliant
    • Meets FMVSS 108 and CMVSS 108 requirements for automotive lighting


  • Diameter: 4-5/16"
  • Diodes: 4
  • Power draw at 12.8 volts:
    • Stop/turn signal light: 0.16 amps
    • Tail light: 0.008 amps
  • Lifetime warranty on LEDs

Optronics trailer tail light dimensions

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 a weathertight connection as pictured above (weathertight plug sold separately). This type of connection is designed to help block out moisture.

STL413RMB Optronics FLEET Count 4" Round Combination LED Trailer Taillight - Red - Weathertight Plug

Video of LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 4 Diodes - Round - Red Lens - Weathertight

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

Video Transcript for Optronics Trailer Lights - Tail Lights - STL413RMB Review

Today we're going to be taking a look at part number S T L four one three R M B. This is the Optronics LED trailer light. The round trailer light is going to serve three functions. It's going to function as your stop light, your tail light, and your turn signal light. It's going to feature the sonically sealed water proof housing and lindge unit, so this trailer light is submersable. LED's are going to make great replacements for incandescent lights, they're going to last a lot longer.

They're going to be more efficient, and you don't have worry about replacing the bulbs, and you don't have to worry about brittle filaments. We're going to have the polycarbinate red lens and the polycarbinate white housing, very strong and durable. This is designed to be a recess mount installation with a mounting grommet. Your mounting grommet is sold separately. Here on the back side we have the weather tight connection point. This does require an adapter, part number A L four five P W T B, that is sold separately. That is required in order to work with an industry standard three prong plug.

The light is department of transportation compliant. We're going to take a few measurements real quick, starting with the overall diameter. That's going to give us a measurement of about four and five sixteenths of an inch. If we measure the depth, that's going to give us a measurement of about eleven sixteenths of an inch. If we take a look at the depth, including the plug here on the back, that's going to give us a measurement of about one and five eighths of an inch. Now, this lights going to contain four diodes or four LED's. It's going to have a power droll of twelve point eight volts.

For the stop and turn lights it has zero point one six zero amps. For the tail lights, zero point zero zero eight amps. Optronics is going to put a lifetime warranty on our LED's, we're going to go and hook it up to our external power supply, that way you can see what it looks like with power running to it. So here's what the plus looks like that goes with it. Plug it in, it snaps in there for a nice, tight, secure connection. So you can see here, it sends out a nice, strong, consistent signal.

It's going to have four LED's, this is going to be the tail light function when we apply our brakes. You see how that illuminates for a stronger signal output, and it's going to function the same way when we activate our turn signal. That's going to do it for today's review, part number S T L four one three R M B.


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Info for this part was:

Edited by:
Leah B
Installed by:
Cole B
Written by:
Amy B
Updated by:
Brian T

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