Optronics LED Trailer Turn Signal and Parking Light - Submerislbe - 10 Diodes - Oval - Amber Lens

Optronics LED Trailer Turn Signal and Parking Light - Submerislbe - 10 Diodes - Oval - Amber Lens

Item # STL72AB

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STL72AB - Submersible Lights Optronics Tail Lights
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6-7/16" x 2-5/16" Oval. Waterproof, LED trailer light serves as a turn signal and parking light when properly mounted. Durable polycarbonate housing and lens. Flush mount with grommet (sold separately). Accepts standard 3-prong plug. Lowest Prices for the best trailer lights from Optronics. Optronics LED Trailer Turn Signal and Parking Light - Submerislbe - 10 Diodes - Oval - Amber Lens part number STL72AB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (13)
  • Q & A (8)
  • Videos (1)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - STL72AB

  • Tail Lights
  • Oval
  • LED Light
  • Amber
  • Recessed Mount
  • 6-1/2L x 2W Inch
  • Submersible Lights
  • Optronics
  • Turn
  • Parking

6-7/16" x 2-5/16" Oval. Waterproof, LED trailer light serves as a turn signal and parking light when properly mounted. Durable polycarbonate housing and lens. Flush mount with grommet (sold separately). Accepts standard 3-prong plug.


  • Oval LED trailer light acts as a turn signal and parking light when properly mounted
  • Sonically sealed, waterproof housing and lens unit is submersible
  • LEDs make great replacements for incandescent lights
    • Last 50 times longer
    • More efficient - provide better light with less power output
    • No bulbs to replace - no brittle filaments
  • Durable polycarbonate housing and lens
  • Amber lens over white LEDs
  • Compatible with 12V DC systems
  • Flush mount with grommet (A70GB - sold separately)
    • Mounts in any 360-degree position
  • Accepts industry standard 3-prong plug (A45PB or A47PB - sold separately)


  • Dimensions: 6-7/16" long x 2-5/16" tall x 1-3/4" thick
  • Diodes: 10
  • Power draw at 12.8V:
    • Turn: 0.243 amps
    • Tail: 0.046 amps
  • Lifetime warranty on LEDs

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # LED2238-27A
Grote # 53963
Peterson # M2875A-2

Optronics STL72 Series Sealed LED 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.

Recessed-Mount Light

Recessed mount light

Recessed-mount trailer lights install underneath a grommet (A70GB - sold separately). These lights will extend into the mounting surface and require that a hole be cut into your trailer.

STL72AB Optronics LED Trailer Turn Signal and Parking Light - Submerislbe - 10 Diodes - Oval - Amber Lens

Alternate part number: STL-72AB

California residents: click here

Video of Optronics LED Trailer Turn Signal and Parking Light - Submerislbe - 10 Diodes - Oval - Amber Lens

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 - STL72AB Review

Today we'll be reviewing part number STL72AB. This is the Optronics Sealed 6-1/2 inch Oval LED Trailer Turn Signal and Parking Light. It's going to feature 10 super diodes. It's going to have the amber lights in there. It's going to be an amber in color. The amber, oblong light is going to function as your parking and turn signal light. It's got the sealed, waterproof housing and lens unit.

It's going to have a corrosion-resistant design. Again, it's going to feature the 10 Super LEDs. It will accept industry standard, 3-prong plug here on the back. A couple of different options to choose from here at etrailer.com. You can choose a right angle pigtail plug, with part number A47PB, or you can choose a straight angle or a straight pigtail plug, with part number A45PB. You're also going to need a rubber grommet. That's required for complete installation.

That's going to be available with part number A70GB. If you need a steel mounting bracket, you can find that with part number BK70BB. This will flush mount with the mounting grommet and plug. They are required for complete installation. They are going to be sold separately. The dimensions of the overall unit. When you take a look at the overall length, it's going to be 6-1/2 inches by 2-1/8 of an inch.

If we measure the overall, kind of like the back of the housing there, that's where we're going to get the 2-5/16 inch measurement from. Then the depth is going to measure right at 1 inch just up here at the front of the housing. When it comes to the light draw, this is going to draw 0.275 and 0.042 amps at 12.8 volts. We're going to go ahead and hook it up to our external power source and show you what it looks like when it has power running to it. I'm going to turn off the overhead lights and turn on our power source. You can see there that it's a nice bright LED amber signal. Then we can hit our break switch. That's going to illuminate everything a little bit brighter, providing a lot of light to come through.

Also functioning as our turn signal. That's going to do it for today's review of part number STL72AB. This is the Optronics Sealed 6-1/2 inch Oval LED Trailer Light. .

Customer Reviews

Optronics LED Trailer Turn Signal and Parking Light - Submerislbe - 10 Diodes - Oval - Amber Lens - STL72AB

Average Customer Rating:  5.0 out of 5 stars   (13 Customer Reviews)

6-7/16" x 2-5/16" Oval. Waterproof, LED trailer light serves as a turn signal and parking light when properly mounted. Durable polycarbonate housing and lens. Flush mount with grommet (sold separately). Accepts standard 3-prong plug.


etrailer.com had everything I needed to complete my trailer build, and at the right prices. The products are quality, with competitive pricing. etrailer.com delivered as promised, it was our local delivery that delayed sending the product out to my home, but one call to Pat, and the issue was immediately resolved, and I had the product that night! Great product, Great customer service! 693627


high quality, fast and a good price. Tough to beat. 654745


very good 649841


Delivery on time , price right , will use again and again! 435793


I use several of these on my 18 wheeler. They offer the best contrast between marker light and signal of any I have found. If I could keep the animals and gravel from knocking the hell out of them I'd be set. 415352


I enjoy these lights every time the sun goes down. Many of my truckin buddies comment on how bright these lights are and ask where I got them. Still love these lights and figure I always will. I have purchased many products from etrailer and use them on both my personal trailer as well as my 18 wheeler. Thanks for asking.

Peanut B - 08/07/2018



These trailer lights were easy to install and work great. Because they are LED and replaced an older bulb style light, I expect they will last much longer. 390315


this Item was the right color,,, the same plug in,,, great fit,,, makes my trailer look new again,,, great price,,, 295769


Lightning fast shipping, and the light was very easy to install. Perfect match for the other fender. Certainly will order from this supplier in the future! 252812


We have since sold this dolly. Light was working perfectly when we sold it.

Durk - 05/29/2017



Great product a little thicker than the original on the edge but not a big deal for my installation. Bright light and delivered fast. 187189


Very happy with service and products. Your scope of inventory is amazing. Will send pictures of the installations after I get back from vacation in December. Used the strip lights to replace the original brake strip lights on a Winnebago "View" as well as adding additional turn lights. The other ones were used to improve a "light bar" that is on the rear of the car being towed. Were incandescent. The LEDs are much brighter and draw a fraction of the current. 160811


Awesome product and fast delivery 124106


Very bright and easy to install. 13058


Purchased the amber lights to replace two red ones so I can use them for turn signals along with my saddlebag lights on my trike. I was having a hard time finding what I wanted at the right price when I came acorss your site. You were prompt in getting my order out and delivered at my home. The photo shows them installed on the trike The top one's are the tail and stop lights Thank you for great service. 6251


Ask the Experts about this Optronics Trailer Lights

Do you have a question about this Trailer Light?

  • Are Optronics # STL72AB Oval LED Lights Usable as Stop-Turn-Tail Lights
  • The Optronics Amber Oval LED Trailer Turn Signal and Parking Light, part # STL72AB, is intended for use as a trailer turn signal and parking light. DOT requires that brake lights always have a red lens. Optronics offers a similar-size 3-function Stop-Turn-Tail LED Light with a red lens, part # STL22RB. I have included a video on this particular item and also one addressing trailer wiring. For both of these light assemblies you will need the Rubber Grommet, part # A70GB, which provides...
    view full answer...

  • Adding LED Amber Turn Signals to a Trailer
  • LED clearance light # CBL22AB is not DOT rated as a turn signal so I do not recommend using it. LED light # STL72AB can be used as a turn signal. It is one of the smaller options at 6-7/16" Long x 2-5/16; tall x 1-3/4" thick. Used with bracket # BK70BB and grommet # a70gb you will be able to mount it in your desired location. You will also need harness # A45PB. But those lights on your trailer are side marker lights, not turn signals. US trailers have the turn signals combined with...
    view full answer...

  • Can a Bus with a 24 Volt Electrical System Tow a Trailer and Car with 12 Volt Electrical Systems
  • On the trailer it will be easy because you can add 24 volt lights such as # STL23R24B and # MCL66A24B just to name a few. But to flat tow a vehicle that is a different story. You would need to obtain a voltage reducer device and put one on each circuit ahead of the trailer connector so that it is 12 volts on the output side. We do not carry these devices and from what I know they can be expensive. If you go this route then the trailer would not have to have 24 volt lights.
    view full answer...

  • Does Custer LED Amber Quad Flash Kit # CPL65A-STR Also Have Brake and Turn Signal Functions
  • The Custer LED Amber Quad Flash Kit # CPL65A-STR that you referenced is strictly a strobe/flash set of LEDs in this light. An amber brake/turn signal LED light that is the same 6-1/2 inches is the Optronics # STL72AB. With this light you will also need the grommet # A70GB and a pigtail for power. If you need the straight pigtail it is # A45PB and the right angle pigtail is # A47PB.
    view full answer...

  • Replacement Front Turn Signal for a 1989 Ford F-59
  • For a replacement turn signal to use on your 1989 Ford F-59, the Trailer Turn Signal and Parking Light part # STL72AB should work for you. In order to be sure you will need to measure the light you have now. If it measures to be around 6-7/16" long x 2-5/16" wide x 1-3/4" deep then the light will work for you. In order to install it you are also going to need to use the Right Angle 3-Wire Pigtail part # A47PB and possibly the PVC Grommet for 6-1/2" Oval Trailer Tail Lights part # A70GB.
    view full answer...

  • Recommendation of Turn Signal and Parking Light for Off-road use
  • I recommend the amber trailer turn signal and parking light # ST70AB as it's sealed and waterproof. The rubber grommet # a70gb will provide shock mount protection extending the life of the lamp. The Optronics # MCL157AB could possibly be used as a turn signal but not recommended. The grommet you referred # A56GB would work as it will provide shock protection especially that you will be off-road. It will seat properly once the light is plugged into the grommet. The LED equivalent...
    view full answer...

  • Amber Version of LED Stop//Tail/Turn Wesbar 273564
  • Yes we do. You would want the part # STL22AB for an amber version of the light part number you listed. Another option is the part # STL72AB or part # STL70AB.
    view full answer...

  • Bright LED Amber Light that Can be Seen Straight On and at an Angle
  • I think I have the perfect light for you. Take a look at the LED amber clearance light # MCL49AB. This light has 14 diodes so it will be bright and you can see it straight on and from an angle. I have included a link to a video review of this light for you. You might also be interested in some conspicuity tape, # RE18T, for its reflective properties.
    view full answer...

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Info for this part was:

Expert Research:
Michael H
Expert Research:
Adam R
Video by:
Kathleen M
Updated by:
Laura H
Updated by:
Amy B
Updated by:
Sarah W
Updated by:
Brian T
Installed by:
Cole B

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