1. Trailer Lights
  2. Optronics
  3. Tail Lights
  4. Rectangle
  5. Incandescent Light
  6. Red
Aero Pro Combination Trailer Tail Light - Waterproof - 8 Function - Incandescent - Driver Side

Aero Pro Combination Trailer Tail Light - Waterproof - 8 Function - Incandescent - Driver Side

Item # ST37RB
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Shipping Weight: 0.91 lbs
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Optronics Tail Lights - ST37RB
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7-7/8" x 3-1/4". Low-profile incandescent light serves 8 functions: brake, tail, turn, side marker, side reflector, rear clearance, rear reflector, and license plate light. Shock proof sockets protect bulbs. Stud mount. 3-Wire design. Lowest Prices for the best trailer lights from Optronics. Aero Pro Combination Trailer Tail Light - Waterproof - 8 Function - Incandescent - Driver Side part number ST37RB can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (461)
  • Q & A (23)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - ST37RB

  • Tail Lights
  • Rectangle
  • Incandescent Light
  • Red
  • 8L x 3W Inch
  • Surface Mount
  • Stop/Turn/Tail
  • Side Marker
  • Rear Clearance
  • Side Reflector
  • Rear Reflector
  • License Plate
  • Submersible Lights
  • Optronics

7-7/8" x 3-1/4". Low-profile incandescent light serves 8 functions: brake, tail, turn, side marker, side reflector, rear clearance, rear reflector, and license plate light. Shock proof sockets protect bulbs. Stud mount. 3-Wire design.


  • Red, rectangular trailer light serves 8 functions for trailers more than 80" wide
    • Stop, Turn, Tail, Rear Clearance, Rear Reflex, Side Marker, Side Reflex
    • Built-in license plate light illuminates trailer license plate
  • Aero Pro design delivers contemporary styling
  • Sealed, waterproof housing and lens unit
  • Built-in reflector removes the need for a separate reflector
  • Incandescent bulbs are easy to replace
  • Shock-proof sockets protect bulbs against damage
  • Durable plastic housing with screw-on lens
  • Compatible with 12V DC systems
  • Stud mount to trailer with included hardware
  • 3-Wire design hardwires to trailer
  • DOT compliant


  • Configuration: driver side
    • Passenger side: ST36RB (sold separately)
  • Dimensions: 7-7/8" long x 3-1/4" tall x 2-7/8" thick
  • Distance between mounting studs (center on center): 2"
  • Bulb type; 1157
  • Number of bulbs: 2
  • Power draw at 12.8V:
    • Stop/turn: 2.3 amps
    • Tail: 0.9 amps
  • 3-Year limited warranty

Manufacturer Cross Reference
Light will work as an exact replacement for:
Wesbar # 3504
Peterson # M456L

Optronics ST37RB Waterproof Combination Tail Light Dimensions

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 circuit board is sealed, which means that water will not damage the diodes or circuit board.

Combination Lights for Trailers Over 80" Wide

Flatbed trailer over 80" wide with combination tail lights

If a trailer is 80" or wider at its widest point, then it requires rear clearance lights in addition to basic trailer lights. These clearance lights indicate the width of the trailer when it is viewed from the back.

To meet these requirements on a flatbed utility trailer where the bed extends past the wheels, you can install combination trailer lights that include the rear clearance function. For proper mounting, the lights must be installed at the widest points on the rear of the trailer - one on each corner.

ST37RB Optronics Aero Pro Combination Tail Light for Marine Trailers Over 80" Wide - Waterproof - 7 Function - Incandescent - Rectangle - Driver Side - Left Hand

Alternate part number: ST-37RB

California residents: click here

Customer Reviews

Aero Pro Combination Trailer Tail Light - Waterproof - 8 Function - Incandescent - Driver Side - ST37RB

Average Customer Rating:  4.9 out of 5 stars   (461 Customer Reviews)

7-7/8" x 3-1/4". Low-profile incandescent light serves 8 functions: brake, tail, turn, side marker, side reflector, rear clearance, rear reflector, and license plate light. Shock proof sockets protect bulbs. Stud mount. 3-Wire design.

- ST37RB

Great experience from support to purchase to delivery. Exactly the light I needed for my Tracker Trailstar trailer.

- ST37RB

The light works without issue and the installation was painless. The cross reference info makes it easy to buy with confidence from etrailer, and I will do so again when the need arises. The fact that this company reaches out to you after a year to check on your satisfaction is exemplary and I appreciate the after the sale service.

Still bright at Night! Flawless product from e-trailer.
kt - 07/05/2017

- ST37RB

Perfect fit, fast shipping, great communication and updates

- ST37RB

Ordered the ST37RB trailer tail lights to replace tail lights on my boat trailer . I am very pleased with them as they were exactly the same as original lights therefore no need for modifications when mounting. Ordering was easy and arrived on time

- ST37RB

This was the exact replacement tail-lights that was on my 2016 pontoon boat i was extremely pleased with the speedy delivery once i made my purchase. i have just completed the installation of both trailer lights and it was not that difficult since it was a exact replacement. i will definitely be ordering from your company in the future for my replacement boat parts. Also the prices for my purchase's were in line with what i expected. thanks Joey B. satisfied customer from Alabama

- ST37RB

Product was an easy replacement. I did have to extend the holes in the trailer to make the bolts in the lights line up. You can use a round file or drill the holes out to a larger size. This may not be required for you trailer.

- ST37RB

Great all in one light had to splice wires to existing plug but overall excellent! Was for a 2016 TRACKER Pro Guideā„¢ V-175 Combo boat trailer.

- ST37RB

I am very pleased with the product that I have purchased from etrailer !!!, the product was everything I expected great prices craftsmanship The aftermarket product was better than the Original part that came on the trailer, I plan to buy the passenger side in the near future. I can't send any pictures of my project because I'm in the middle of a winter storm .lol but I'll make sure I send pictures when I install them , thank you etrailer A1 with me.

- ST37RB

The tail light was wrapped well in the shipping container. It arrived in great condition. It was exactly as advertised. This was a replacement for a broken light. The light fit perfectly into the space on the trailer of the previous light.

- ST37RB

Used the light for a year so far and it works good. Perfect match for the other light.

- ST37RB

I received the trailer brake light fast and very secure in the package. I have not had a chance to install it but the manufacturing and product integrity looks excellent. I will be doing business again if I need to.

- ST37RB

These lights work real good because you can see them from far away. Very bright. They sometimes don't last a year, but I have had a few that do last longer then others. I like these, because other drivers can see my boat.

- ST37RB

I needed to replace a taillight on my boat trailer. Easily found an exact replacement at etrailer.com for a very good price. Shipping cost was reasonable.

- ST37RB

When the light arrived and I opened the box, it looked perfect. I immediately went outside and removed the old light. I installed and spliced in the new light and then tested it. It worked perfectly! I could not be happier! Thanks, etrailer.com.

- ST37RB

I wish this would of had the plug on it like the passenger side but I used the plug for the old one and it worked just fine

- ST37RB

I am very satisfied with the product and the service I received from etrailer. I will certainly recommend etrailer to others. Thank you.

- ST37RB

Optronics rear trailer lighter was easy to install, their products are quality parts.

- ST37RB

Perfect replacement. Fast shipping and great service. That's why I always choose etrailer.com!

- ST37RB

Perfect replacement

- ST37RB

Didn't take long for it to be delivered. Was happy to locate the product easily.

- ST37RB

Fast and what I ordered

- ST37RB

Great service, fast shipping!

- ST37RB

As usual your products I've orered over the years is always of good quality. These ligjts are no exception.

- ST37RB

Product was shipped on time and arrived in good condition. Tracking information on the website is great.

- ST37RB

Product came promptly to my address Perfect match, easy installation, works perfect!

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
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Employee Brian T
Updated by:
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Employee Matthew E
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