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Optronics LED Side Marker Light and Mid-Ship Turn Signal - Submersible - 9 Diodes - Amber Lens
Optronics

Optronics LED Side Marker Light and Mid-Ship Turn Signal - Submersible - 9 Diodes - Amber Lens

Part Number: STL75AB
In Stock
$20.95
Trailer Lights
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6-1/2" x 2-5/16". 2-Function, waterproof LED trailer light acts as both a side marker and turn light. Durable polycarbonate housing and lens. Recessed mount with grommet (not included). Accepts standard 3-prong plug. E2 Rated. Great Prices for the best trailer lights from Optronics. Optronics LED Side Marker Light and Mid-Ship Turn Signal - Submersible - 9 Diodes - Amber Lens part number STL75AB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (44)
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Optronics Trailer Lights - STL75AB

Highlights

  • One Light, Two Functions: Acts as both a side marker and mid-ship turn signal for visibility.
  • Reliable In Any Weather: Sonically sealed, waterproof housing keeps water out for lasting use.
  • Fewer Replacements Needed: 9-diode LED design lasts 50× longer and draws less power than bulbs.
  • Tough Build: Durable polycarbonate lens and housing resist impact and road wear.
  • Simple Power Hookup: Works with 12V DC systems using a standard 3-prong plug (sold separately).
  • DOT Compliant: E2 rated for vehicles under 30' so you stay road legal.

Features to know about

Brighter, Longer-Lasting, and Efficient: 9-Diode LED Light

Old incandescent lights burn out fast and draw more power than they should. This one uses 9 LEDs that last up to 50 times longer while staying energy-efficient. At 12.8V, it only draws 0.141 amps for the turn signal and 0.060 amps for the side marker. You get a brighter amber light with low current draw and no bulbs to replace. It’s a clean upgrade that keeps your lighting sharp and reliable for the long haul.

Built for Wet Conditions: Fully Submersible and Sealed Construction

If your trailer ever sees rain or gets near the water, this light is built for it. The housing and lens are sonically sealed into a single waterproof unit, keeping moisture out so it won’t corrode or short out the diodes. That sealed design makes it submersible—perfect for use in harsh environments where reliability matters most.

Better Safety on the Road: Dual-Function Marker and Turn Signal

Visibility makes all the difference when you’re traveling at night or in traffic. This E2-rated light works as both a side marker and a mid-ship turn signal when properly mounted, clearly signaling your position and direction to other drivers. The amber lens covers white LEDs for a bright, uniform glow that meets DOT standards for vehicles under 30 feet in length.

Clean, Flush Fit: Recessed Mount Design

For a solid install that looks neat, this light mounts recessed into your trailer with grommet A70GB (sold separately). It accepts standard 3-prong plugs like the A45PB or A47PB for an easy electrical connection. Measuring 6-1/2" long x 2-5/16" tall x 2-3/4" thick, it fits securely into a matching cutout without sticking out awkwardly, giving you a clean, finished look that’s built to last.

Installed recessed-mount Optronics LED trailer light shown flush with trailer surface to illustrate correct mounting style.

Specs

Dimensions

  • Dimensions: 6-1/2" long x 2-5/16" tall x 2-3/4" thick

Technical image showing the dimensions and profile of the Optronics STL75AB submersible amber LED side marker and mid-ship turn signal light.

Electrical

  • Power draw at 12.8V (Turn): 0.141 amps
  • Power draw at 12.8V (Side marker): 0.060 amps
  • Compatible voltage: 12V DC electrical systems

Lighting

  • Light type: LED trailer light functions as a side marker light and a mid-ship turn signal when properly mounted
  • Diodes: 9
  • Lens color: Amber lens over white LEDs
  • E rating: E2 rated for vehicles less than 30' in length
  • Compliance: DOT compliant
  • Lifetime warranty on LEDs

Construction

  • Housing and lens: Durable polycarbonate housing and lens
  • Waterproof: Sonically sealed, waterproof housing and lens unit is submersible
  • Mount type: Recessed mount with grommet (A70GB - sold separately)
  • Plug type: Accepts industry standard 3-prong plug (A45PB or A47PB - sold separately)

STL75AB Optronics 12V LED Side Marker Light and Mid-Ship Turn Signal - Submersible - 9 Diodes - Amber Lens - E2 Rated

Alternate part number: STL-75AB





Customer Satisfaction Score:

Ratings & Reviews

5.0

44 reviews
Review sort icon
6-1/2" x 2-5/16". 2-Function, waterproof LED trailer light acts as both a side marker and turn light. Durable polycarbonate housing and lens. Recessed mount with grommet (not included). Accepts standard 3-prong plug. E2 Rated.

by:

Excellent



by:

The lights fit, and are bright.



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Exactly what was ordered and shipped fa st.



by:

Good product and fast delivery



by:

Prompt delivery and the right product!



by:

Excellent products Not the first time for using this line. Always been satisfied with product and service. Keep it up!



by:

Exactly what we ordered and matches OEM



by:

Good photos and information for the product on the web-site.



by:

Well made light assembly.



by:

Easy to deal with. They helped me find what I needed and got it shipped overnight to the location I needed it at on time. Great job.
They did such a good job for me the first time, I reordered from them the next day.



by:

Great price and fast shipping.



by:

Very nice product for the cost.....fast shipping and great customer communication...



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Exact replacement.



by:

trailer light replacement



by:

Installed light the day I received it. It has been performing well, for a year.



by:

Awesome looking light! Bright clearance and turn light.



by:

Everything arrived quickly and work great. E-trailer is my "go to" store for my trailer needs.



by:

love this product!!! exact fit!!! better than the factory one!! should have brought two



by:

Bright and a snap to install



by:

wow fast shipping



by:

Replacement side light for my 33ft trailer. Same as original, online order took less than 3 minutes, received light within 3 days. Etrailer is fantastic! I could not be any happier. Thank you etrailer!



by:

Installed as clearance light with turn signal. Makes interstate driving easier when turning or changing lanes.

Leonard profile picture

Leonard

4/23/2017

Works better than expected. When switching lanes pulling a fifth wheel, people respect your highway move.



by:

Love them.
I removed a front flat clearance
light from my motor house and installed this. Much better visibility to motorist on my side to see when I change lanes. (just in case I don't see them)
Just ordered/received two more to replace factory installed incandescent on the sides closer to midship.

Dono profile picture

Dono

2/21/2018

Still working fine. Love the look and the added safety.


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See what our Experts say about this Optronics Trailer Lights

  • Replacement Trailer Light Assembly For a Signal Stat 4070 Trailer Light
    Based on a quick search I do see we have either an Incandescent Amber # ST75AB, or LED Amber # STL75AB light assembly. These both have the 3 prong light connection. Please let me know if your light is any different as there was limited information I could find and it worries me there could be more than this single style.
    view full answer...
  • Replacement Trailer Clearance Light for GloBrite 1250
    The most similar in design and attachment light assembly we have to what you sent in a picture of would be the GloLight LED Side Marker Light and Mid-Ship Turn Signal # STL175AMFB as it has the same lens shape and uses two slots for the screws/hardware to attach with.
    view full answer...
    Image 1 for
  • Replacement Amber Trailer Light for GloBrite 1250
    We do not carry the Glo-Brite brand of trailer light (and I believe they are no longer in business) but we do have a replacement for the model 1250. My research indicates this amber lens light measures 6-1/2-inches x 2-5/16-inches, like the part # ST75AB and the LED version # STL75AB. The lights mount using grommet # A70GB as they are recessed mount and not surface mount.
    view full answer...
  • Cut Out Size for Grommet to Install Amber Side Marker Light STL75AB
    To flush-mount install the Optronics LED Side Marker Light and Mid-Ship Turn Signal # STL75AB you will need to use PVC Grommet # a70gb which requires a 7-5/8" wide x 3-3/8" tall hole, as you can see in the cut out I added of the dimensions of this grommet. You will also need 3-Wire Pigtail for Optronics Trailer Lights # A47PB to complete your installation; this pigtail plugs into the light so you can wire it to your trailer. I have added links to video reviews and installs for you to...
    view full answer...
    Image 1 for
  • Availability of Side Marker and Turn Signal Clearance Lights for Side of 5th Wheel Trailer
    We actually have a few different options for exactly what you are wanting to do. Just choose which one you want based off of the style of the light itself! Miro-Flex LED - # MCL48AB Optronics LED - # MCL32ATB Optronics LED Mid-Ship - # STL75AB GloLight LED Mid-Ship - # STL175AMFB Each of these options functions as a clearance light as well as a side marker light plus they are not recess mounted so they will stick out some. I have attached review videos that you can check out for each...
    view full answer...
  • Installation of STL75AB With Grommet
    At the end of the day you'll still have access to everything that is required to install the new lights since you're removing an existing light; this will allow you to make your electrical connections without any problems. There will always be a certain aspect of each installation that's going to be specific to each trailer and the process you've mentioned using I don't see any issues. If you're installing the # STL75AB then the correct grommet for that light is the # A70GB. You should...
    view full answer...
  • Which Amber Side Marker Light Fits Grommet A70GB
    For an amber side marker light that fits in the grommet part # A70GB the correct part number of the ones you mentioned is the # STL75AB.
    view full answer...
  • Grommet and Wiring Harness Needed to Install Optronics Clearance Light part # STL75AB
    The grommet needed to install the Optronics Clearance light part # STL75AB is the part # A70GB. This will require you have a hole where you want to mount the light that matches the dimensions of the light basically. Or you can also install the mounting bracket part # BK70BB. This attaches to the bottom of a mounting surface. The install harness you'd need is the part # A45PB too.
    view full answer...

Do you have a question about this Trailer Light?


Info for this part was:

Employee Tyler C
Written by:
Tyler C
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T

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