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Aero Pro Combination Trailer Tail Light - Waterproof - 7 Function - Incandescent - Passenger Side

Aero Pro Combination Trailer Tail Light - Waterproof - 7 Function - Incandescent - Passenger Side

Item # ST36RB
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7-7/8" x 3-1/4". Low-profile incandescent light serves 7 functions: brake, tail, turn, side marker, side reflector, rear clearance, and rear reflector. 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 - 7 Function - Incandescent - Passenger Side part number ST36RB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Optronics Trailer Lights - ST36RB

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

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


  • Red, rectangular trailer light serves 7 functions for trailers more than 80" wide
    • Stop, Turn, Tail, Rear Clearance, Rear Reflex, Side Marker, Side Reflex
  • 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: passenger side
    • Driver side: ST37RB (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 # 3571

Optronics ST36RB 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.

ST36RB Optronics Aero Pro Combination Tail Light for Boat Trailers Over 80" Wide - Waterproof - 7 Function - Incandescent - Rectangle - Passenger Side - Right Hand

Alternate part number: ST-36RB

California residents: click here

Video of Aero Pro Combination Trailer Tail Light - Waterproof - 7 Function - Incandescent - Passenger Side

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 - ST36RB Review

Today we're going to be taking a look at part number ST36RB. This is the Optronics Over 80" Aero Pro Submersible Trailer Tail Light for the right hand, or passenger side, of your trailer. The red rectangular trailer light is going to serve seven functions for your trailer, it's more than eighty inches wide, such as your stop, turn, tail, rear clearance, rear reflect, side marker, and side reflect indicators. It's going to feature an Aero Pro design. It's going to deliver a contemporary styling. This is waterproof and corrosion resistant.

It's going to feature a replaceable lens as well as replaceable bulbs. The bulbs are going to sit in a shock proof socket. That's going to guarantee a long bulb life. The replacement bulb for the side marker light is going to be number 193 and the replacement bulb for the tail light is going to be 1157. This is a universal mount design. You can see here on the back side it's going to contain three mounting slots.

The distance that we have, center on center, between two of the slots is going to measure right on two inches. Then from outer slot to outer slot, center on center, is going to be right on four inches. The mounting hardware is included. This light is SAE, DOT, FMVSS, and CMVSS compliant. The wiring design is going to contain three wires.

You're going to have a white wire with a ring terminal for your ground connection, the brown wire is going to be for the tail light function, and then your green wire is going to be for your stop and turn signals. To go over the overall measurements, it's going to give us an overall length of seven and seven-eighths of an inch, an overall width of about three and one quarter of an inch, and then the depth is going to be about two and seven-eighths of an inch. One of the things I really like about this light is on the inside it's going to contain two lights. You're going to have one light for your main tail light and then you're going to have a smaller light on this side for your side marker and clearance light. Those lights, again, waterproof, corrosion resistant design. This can be submersed in water.

Those bulbs actually have a protective casing that goes around the light, like a clear bubble. It's going to be held on there with four screws, and it can be taken off that way you can gain access to replace the bulbs as well. That's just a really neat design. It's going to protect the life of the bulb. We're going to go and connect this to our external power supply that way you can see what it looks like with power running to it. We'll also be able to turn off our overhead lights so you can see it in a low light setting. This is going to be the tail light function, sends out a nice, consistent signal. You can see, right here, you have the side marker clearance light and then you've got your main light right here in the middle. I'm going to apply our brakes. It's going to brighten up, send out a more consistent or brighter signal. That's also going to function as our turn signal. That's going to do it for our review of part number ST36RB. This is the Optronics Aero Pro Submersible Trailer Tail Light for the right hand, or passenger side, of your trailer. .

Customer Reviews

Aero Pro Combination Trailer Tail Light - Waterproof - 7 Function - Incandescent - Passenger Side - ST36RB

Average Customer Rating:  4.9 out of 5 stars   (389 Customer Reviews)

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

- ST36RB

Works great....it matches the outher one on trailer perfect 694143

- ST36RB

This boat trailer tail light was just as described so it was perfect. 673185

- ST36RB

The service was great....received the product faster than expected, price was very reasonable and the product was without issue. Would definitely use them again! 668744

- ST36RB

I ordered new lights for my husband. I was really did not want to do this. I thought it would take forever and I would need to ask him a lot of questions. But no, it was very easy, almost took no time at all. The things I ordered were sent as promised, we received everything quickly. We were delighted!!!! 659737

- ST36RB

The product is awesome ! 655160

- ST36RB

Great job! Ordered today and received the next day. That's what I pay for! 639565

- ST36RB

Fast and accurate delivery. Packaged well and fit as described. 616695

- ST36RB

Great service great products 616466

- ST36RB

I received my order quickly, the product was well packaged and worked perfectly. I would recommend etrailer.com 615727

- ST36RB

product worked perfectly and is still working. thanks for your concern. 593607

- ST36RB

Nothing too technical about the part itself. A simple swap out of the old parts. Matched the dimensions of the OEM parts so the installation went smoothly. Deliver from etrailer was excellent and prompt. Will definitely continue doing business with etrailer! The best online vendor for providing installation videos and answering technical questions. Keep up the good work! 427127

- ST36RB

Purchased to replace broken lights on my boat trailer. They fit perfectly using previous mounting holes. Electrical connections straight forward. Left hand unit contained illumination for license plate. 411108

- ST36RB

Outstanding Customer Service. Top Quality Produck. Very impressed. Will order again. 407076

- ST36RB

It is working exactly as advertised. 401113

Thank you for reaching out. Your light is working fine, thanks.
Lu A - 07/05/2018


- ST36RB

product was exactly as ordered, arrived a day early and fit perfectly. 387678

Still working fine, nice to have a dependable product.
John D - 06/02/2018


- ST36RB

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 381725

- ST36RB

Quality part as advertised. Company was a great find! 379764

- ST36RB

I ordered the product it was shipped within a week ,matched up perfectly. 362117

- ST36RB

Quick replacement. Good quality. 362023

Working great. No problems.
mark - 04/03/2018


- ST36RB

Excellent products as always! Fast delivery and great customer service. That's why I keep coming back to etrailer.com. 346860

- ST36RB

Couldn't believe how fast my light was shipped out. Everything was received as expected. Great light, fast service... thanks e-trailer. 324590

Awesome! Happy with my purchase!
John D - 01/30/2018


- ST36RB

Direct replacement of existing light, just had to connect wiring. 284821

- ST36RB

Great product and service. 282952

- ST36RB

The product was exactly what I ordered, and it was delivered on time. 282240

Still Great!
MARSHA Y - 08/10/2017


- ST36RB

Product arrived in three days. Brand new in package. I am very satisfied and will order from here again. 275922

The lights still work great. No Issues.
Richard K - 07/25/2017

Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Replacement Tail Light Lens for Tracker Trailstar Trailer
    The lights you have on your trailer are # ST37RB and # ST36RB. The replacement lenses are # A39RB for the front lens and # A37RB for the side marker.
    view full answer...
  • Replacement Outer Lens for # ST36RB or # ST37RB
    The Replacement Side Marker Lens # A37RB is the replacement outer lens for both the LH and RH tail light. It is the same part, you just rotate it for the side you desire. This will work with both the ST37RB and # ST36RB.
    view full answer...
  • Replacement Trailer Light for a 2006 Tracker Boat Trailer with the Optronics ST-36 RH Tail Light
    The light on your Tracker boat trailer is the right hand ST36 series trailer light from Optronics as is the # ST36RB, that you referenced on our website. They are essentially the same light, but Optronics has been known to make slight changes to their lights from time to time. I have attached a diagram of this light showing its dimensions for you to check out. The dimensions should not be much different from your light if at all, but the important dimensions to look at are the 2 inch...
    view full answer...
  • How to Find Light Part Number on Four Winns Boat Trailer
    Trailer makers don't usually keep track of the brand/model of lights used in trailer production and the numbers you took from your light's broken lens are not part numbers, but rather DOT coding. The light's base is likely to have the part number printed on it so you can check there for a brand and/or part reference. Once you find that you can type it into our search box. If you cannot find that information you can still review the replacement light lenses we offer which are shown on...
    view full answer...
  • Replacement Tail Light for Obsolete Wesbar Trailer Tail Light 403028
    The Wesbar tail lights that are associated with lens kit # W003372-73 were made obsolete on 3/25/2011. You could replace them with a similar LED version, # 271594 for the right and # 271595 for the left side. I also did a crossreference with Optronics and they list light # ST36RB as a match for the old Wesbar lights.
    view full answer...
  • Replacement Optronics Rectangle Trailer Light With Plug-In Style Connector
    We do carry rectangular trailer lights that come with the Plug-N-Go connector like the Optronics Right Hand Trailer Light, # ST26RPG, and # ST36RPG. These two lights come with the 2-wire molded connector. If the connector on your trailer has a 3-wire connector, then you may want to look at the Optronics Right Hand Trailer Light, # ST66RPG. I have attached photos showing what the connectors look like. You can also view photos of the trailer lights by following the product links that I have...
    view full answer...
  • Matching Light Assembly to Go With Part # ST37RB
    The part # ST37RB that you have is designed to be used on the driver side of a trailer, or left side, of the trailer. If you wanted the matching assembly to go on the other side of the trailer you would want the part # ST36RB as well. Realistically either light could go on either side of the trailer.
    view full answer...
  • Replacing a 4-Way Connector with 7 Wires on a 2007 Tracker Trailstar Boat Trailer
    Since this is on a boat trailer the 2 additional white ground wires are ground for the lights. This is fairly common on aluminum frames and boat trailers in general because aluminum is a poor metal for grounds and lights grounded near the tail lights will get dunked in water. The 2 brown wires are both running light wires which allows you to run one wire per side instead of having to run a jumper wire from one side of the trailer to the other. You can still use a 4-Way with wiring such...
    view full answer...
  • Tail Lights that Plug In Instead of bare Wires for Trailstar Boat Trailer
    We do have the Optronics ST37 series lights that have the connector instead of bare wires. Aero Pro light # ST37RPG has the plug but just for the running lights, brake, and turn signal wires. The ground is separate. The matching right hand side is # ST36RPG. We also have similar lights for Wesbar, # 271595 and # 271594. I have included some links to video reviews of these light style for you.
    view full answer...
  • Replacement Trailer Tail Light with 3-Wire Plug to Replace Optronics ST-36
    Trailer tail light # ST66RPG should be the light that you will need. It has the 3-wire plug.
    view full answer...
  • Recommended Replacement Trailer Stop, Turn and Tail Light for an Optronics ST-36
    Although the # STL36RB light you referenced is the same size and shape as the other ST-36 Optronics lights, it is an LED light. The ST-36 by itself would have a standard bulb. If you need a replacement light with the standard bulb, you would use # ST36RB. To install either version of the light, you will need to cut off the plug and connect the wires from the light directly to the trailer wiring. You can view a standard trailer wiring diagram at the included link if you need it for...
    view full answer...
  • Can the Optronics ST36RB Right Hand Light Be Used on the Left Hand Side of the Trailer
    If you have a separate bulb to illuminate the license plate, the # ST36RB could be used on the left side.The difference between the # ST36RB light and the # ST37RB is that the # ST37RB has a license plate light to illuminate the trailer's license plate. To mount the # ST36RB on the left hand side may require some modification to fit your application.
    view full answer...
  • Do You Have a Replacment Lens for Optronics Light part STL37RB
    I spoke with my contact at Optronics and they do not have a replacement lens for the LED STL37RB or part # STL36RB. They do have them for the incandescent version, part # ST37RB or part # ST36RB. If you have the incandescent lights, the replacement lens is part # A39RB.
    view full answer...
  • Replacement Rear Light Lens for Boat Trailer
    I would be happy to get you the right replacement lights though the SAE is not a model number, just DOT coding. However, based on what we know about other customers who have needed similar parts then LED lights # ST36RB and ST37RB are likely going to work for you. These are left and right hand LEDs that are 7-7/8" long x 3-1/4" wide x 2-7/8" tall surface mounted lights. You would need to measure your current lights and if they are the same size then these lights would work great for...
    view full answer...
  • What are the Dimensions of the Optronics Lens Part # A39RB
    The dimensions of the Replacement Tail Light Lens for ST36RB and ST37RB, item # A39RB, are 7-7/8 inches Long x 3-1/4 inches Wide. This lens is designed to fit the Over 80 inch, Aero Pro Submersible Trailer Tail Lights, item # ST36RB and # ST37RB.
    view full answer...
  • Replacement Light Recommendation For Left Side Of Trailstar Pontoon Trailer
    The replacement light assembly for your Trailstar Pontoon boat for the left side is part # ST37RB. This is a submersible light that features the tail light functions and the license plate light as well. I have attached a drawing that shows the dimensions of the light you can check out.
    view full answer...
  • Availability of LED Version of Aero Pro Trailer Taillight # ST36RB
    We do have just what you are looking for. The part # STL36RPG is an LED version of the # ST36RB that has the 3-prong connector you want. The matching side to this is the part # STL37RPG.
    view full answer...
  • Replacement Lens for LED Boat Trailer Lights
    The replacement lens does fit LED passenger side boat trailer lights, though to get the correct lens, you do need to know what light you have specifically. The Replacement Tail Light Lens # A39RB you referenced is the correct replacement lens for the Aero Pro Combination Trailer Tail Light - Passenger Side # ST36RB as well as the Driver Side ST37RB; as a kit these are the Aero Pro LED Trailer Light Kit for Trailers Over 80" Wide # TLL36RK. There is also a replacement for the side marker...
    view full answer...

Do you have a question about this Trailer Light?

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Info for this part was:

Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
John H
Expert Research:
Adam R
Expert Research:
Jeffrey L
Updated by:
Adele M
Updated by:
Laura H
Updated by:
Brian T
Updated by:
Matthew E

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