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Optronics Trailer Tail Light - Stop, Turn, Tail - Submersible - Incandescent - Rectangle - Red Lens

Optronics Trailer Tail Light - Stop, Turn, Tail - Submersible - Incandescent - Rectangle - Red Lens

Item # ST33RB
Our Price: $11.34
Trailer Lights
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Shipping Weight: 0.29 lbs
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ST33RB - Red Optronics Trailer Lights
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5-5/16" x 3-7/16". Waterproof, incandescent tail light serves as a stop, tail, and turn signal. Shock-proof socket protects bulb against damage. Recessed mount with grommet (not included). Accepts standard 3-prong plug. Great Prices for the best trailer lights from Optronics. Optronics Trailer Tail Light - Stop, Turn, Tail - Submersible - Incandescent - Rectangle - Red Lens part number ST33RB can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (70)
  • Q & A (0)
  • Videos (1)
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Optronics Trailer Lights - ST33RB

  • Tail Lights
  • Rectangle
  • Incandescent Light
  • Red
  • 5L x 3-1/2W Inch
  • Recessed Mount
  • Stop/Turn/Tail
  • Submersible Lights
  • Optronics

5-5/16" x 3-7/16". Waterproof, incandescent tail light serves as a stop, tail, and turn signal. Shock-proof socket protects bulb against damage. Recessed mount with grommet (not included). Accepts standard 3-prong plug.


  • Rectangular incandescent trailer light serves 3 functions
    • Stop, turn, and tail
  • Sonically sealed, waterproof housing and lens unit is submersible
  • Incandescent bulb can be easily replaced
  • Shock-proof socket protects bulb against damage
  • Durable polycarbonate snap-on lens and housing
  • Compatible with 12V DC systems
  • Recessed mount with grommet (A33GB - sold separately)
  • Accepts industry standard 3-prong plug (A45PB or A47PB - sold separately)


  • 5-5/16" long x 3-7/16" tall x 1-15/16" thick
  • Bulb type: incandescent
  • Power draw at 12.8V:
    • Stop/turn: 2.19 amps
    • Tail: 0.49 amps
  • 3-Year warranty

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # SE4060R

dimensions of light

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.

ST33RB Optronics Tail Light - Stop, Turn, Tail - Submersible - Incandescent - Rectangle - Red Lens

Alternate part number: ST33-RB

California residents: click here

Video of Optronics Trailer Tail Light - Stop, Turn, Tail - Submersible - Incandescent - Rectangle - Red 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 - ST33RB Review

Today we're going to review part number ST33RB. This is the Optronics flush mount rectangle trailer stop, turn and tail light. This is a red rectangular light; serves 3 functions - stop light, turn and tail light. It is a sealed, waterproof housing and lens unit. In the inside is a heavy-duty long-life bulb and the socket at that bulb is in a shockproof socket, which guarantees a long bulb life. On the back, you'll notice it does accept the industry standard, 3-prong plugs to install it. This light is designed to flush mounts in a mounting grommet and then the 3-prong plug to plug in the supply power.

Those are required for installation. If you already have those, you can use that. If not, we do sell those parts separately. This is the grommet that it uses. It's part number A33GB.

Basically, you just pop that in there. Then there's the right angle 3-wire pigtail. They offer 2 different 3-wire pigtails. This is the right angle design. It's part number A47PB, sold separately.

The reason it's a right angle you can see when you plug it in, the wires come down at a right angle. If you plug it in like that, you can see that the wires are coming out at a right angle. I'll go ahead and pop that off. Then the other 3-wire pigtail is the straight 3-wire pigtail, A45PB. You can see those when you plug it in, the wires just come out straight.

Either one, whichever is going to fit for your application. A few dimensions on this; the overall and again, this is from edge to edge; edge to edge you're looking at about 5-5/16". The height again is going to be, edge to edge is going to be right in about 3-7/16"; and then the depth on it is going to be right at 2" inches deep. What I'm going to do now is we're going to hook, let's take the straight wire pigtail. We'll go ahead and plug it in and then hook this up to a 12-volt power supply. You have that plugged in, you got your 3 wires coming out. White is your ground, black is your tail light and your red is your stop and turn. What we're going to do is I got a 12-volt power supply here; we'll hook it up to. We'll go ahead and hook up the white for the ground; hook up the red for the stop and the turn; then we'll hook up the black for the tail light function. Now what we're going to do is going to go ahead and turn off the overhead lights. We'll go ahead and turn on the 12-volt power supply and you can see there's your tail light function. When you hit your brakes, you can see the other filament would light up and be stronger, so that would be your brake light. When you hit your turn, it will be the same dual filament; the upper filament would be your turn signal. We're going to turn off our power; turn back on our overhead light. That should do it for the review on part number ST33RB. This is the Optronics flush mount rectangle trailer stop, turn and tail light. .

Customer Satisfaction Score:

Customer Reviews

Optronics Trailer Tail Light - Stop, Turn, Tail - Submersible - Incandescent - Rectangle - Red Lens - ST33RB

Average Customer Rating:  4.8 out of 5 stars   (70 Customer Reviews)

5-5/16" x 3-7/16". Waterproof, incandescent tail light serves as a stop, tail, and turn signal. Shock-proof socket protects bulb against damage. Recessed mount with grommet (not included). Accepts standard 3-prong plug.


Works well, products delivered a day early even during Christmas!


Ordered bulbs for a CM Truck bed. Once again Perfect fit.


Excited again to find these lights on etrailer as the truck has a flatbed with trailer lights and you just can't get the lights for the actual vehicle.

They are great, no issues.
Renee O - 01/09/2018


As described, have been working well.


I checked all of the local dealers for trailers and campers for this light. Not a single one had it in stock, nor could they seem to find it in a catalog. I went onto and found the exact light I was looking for in less than 2 mintues. I ordered it, chose normal shipping and it was at my door in less than 5 days. The light is a perfect match and works flawlessly. Thank you etrailer for saving me a lot of headache and tickets!


I needed a sealed brake/light/turn light that I couldn't find anywhere. etrailer had it at a great price. Shipping was reasonable costs and quick.

Still working great.
Jack - 02/20/2019


Installs easily, just reverse of removal. Just plug in wires, push light around rubber mounting bracket add silicone for water seal. Install fastners to rubber mounting to the trailer and your done . I ordered 2 so I would have a spare. Worked right of the box, can't get much easier.


This was delivered a day earlier than expected. It was packaged well and worked great. I was surprised how difficult it was to find a tail light for my CM flatbed. This one fit perfectly!

Still working perfectly!
RD - 03/10/2017


I needed a special tail light for my Yamaha golf cart but no success with local golf cart dealers including Yamaha. After several failed searches I found etrailer website and the product page was excellent. Found the exact match from product description with dimensions and various viewing angles. Very professional!! The tail lights came as quoted. Thanks. DB


I ordered this light and it is a replacement for my Thule luggage carrier that attaches to my cars hitch. It is an exact replacement for a good price and with fast shipping. It seemed to be hard to find elsewhere.


I have a flat bed on my truck and it uses trailer lights in it. When I looked for replacements all the stores wanted $10 to $30 a peace!!! Etrailer saved me almost $100 over going to may local store. I ordered it on sunday night. I had 2 personal emails telling me my order was ready and being shipped. ON SUNDAY NIGHT!!! I had my order by Wednesday with a follow up email telling me my package was waiting for me at home. My only complaint is why other online stores can provide this service. etrailer, I will be ordering again. Thank You


This product was originally came with a trailer bought about 20 yrs. ago. I needed the exact replacement or modify the trailer taillight mounts. had this original product. The ordering and processing was very professional. The company notification process and product location after shipment was exact. Etrail is one stop shopping for all your trailer needs.


Excellent products and very fast delive ry


Got the reshipment of my tail light in two days. the fast resolution of a
problem that was not etrailer's fault will be a big and important
factor when I need trailer lights again. yes ill do business with
y'all again when lights are needed.


Both the rear signal lights didn't work on my work trailer. These were a perfect match for what was in there. Popped these in in 5 min. and I was back on the road legal again.


Got the exact part for my racing enclosed trailer. Part came just when promised and was packaged very well to prevent damage during shipping. Will definitely purchase again for all my trailer needs.


I ordered this and received the part as promised and on time. The replacement light worked great and went in with no issues.

light is still working great one year later
Chip G - 08/21/2017


It is fairly hard to find these tail lights online and impossible to find them locally. to the rescue. I am in Iowa and delivery via the cheapest option was about 3 to 4 days.


Easy installation, as far as I can tell everything went smoothly. Lights work properly, fit was perfect and installation couldn't have been more simple.
Order recieved quicly. less than a week.
I'll definately come back if I need anything else for my trailer.
Thanks Etrailer


The trailer tail lights were the exact product we needed, installed easily, and work perfectly


I run a small business on a limited schedule an the products and service from etrailer has been extremely good . I would recommend them to everybody!


Thank you for the great tail lights and the very fast shipping. The person I talked to on the phone was wonderful


Awesome website, tracking system and customer service. First time customer, will come back for sure. Highly recommended


these are identical to the original lamp assemblies. Just a little soapy water and they slipped right in. i'm pleased with them.


I was very pleased with product and service. The lights matched exactly and along with the video instructions were an added bonus. Will not hesitate to use your company and product in the future. Great job!!!!!!!!!!!!!

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Can Bulb be Replaced on Optronics Trailer Tail Light ST33RB
    I spoke with my contact at Optronics and he said that the Trailer Tail Light # ST33RB is a sonically sealed complete unit, and the bulb cannot be replaced by itself. If the bulb goes out, replacing the entire light with a new # ST33RB will be your only option.
    view full answer...
  • Available Flush Mounted Tail Lights for Camper
    We have many flush mount taillights to choose from. If you click on the provided link, you can see our selection. We have a few lamps that are similar in size to the Wesbar lamp you mentioned. The Optronics Flush Mount Rectangular Tail Light, part # ST33RB measures 5-5/16 by 3-7/16 inches. It uses a grommet mount, sold separately as part # A33GB and would require a pigtail, part # A45PB. The same lamp is available in a LED version, part # STL33RB which would use the same grommet and pigtail. Optronics...
    view full answer...
  • What Size Hole is Needed to Mount the Optronics Tail Light # ST33RB
    With the Tail Light, # ST33RB, inside of the appropriate grommet, # A33GB, you would need a hole that is approximately 5-7/16 x 3-3/4 inches. You will also need the appropriate wiring harness, # A45PB.
    view full answer...
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Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T

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