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Optronics Trailer Tail Light - Stop, Turn, Tail, License - Round - Red Lens - Driver Side

Optronics Trailer Tail Light - Stop, Turn, Tail, License - Round - Red Lens - Driver Side

Item # ST21RS
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Optronics Tail Lights - ST21RS
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3-7/8" Diameter round. Incandescent trailer light serves 4 functions: stop, turn, tail, and license plate light. Screw-on lens. Durable steel housing. Stud mount to trailer with included studs. 2-Wire design. (1) 1157 bulb. Lowest Prices for the best trailer lights from Optronics. Optronics Trailer Tail Light - Stop, Turn, Tail, License - Round - Red Lens - Driver Side part number ST21RS can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (12)
  • Q & A (3)
  • Videos (1)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - ST21RS

  • Tail Lights
  • Round
  • Incandescent Light
  • Red
  • Surface Mount
  • 4 Inch Diameter
  • Optronics
  • Non-Submersible Lights
  • Stop/Turn/Tail
  • License Plate

3-7/8" Diameter round. Incandescent trailer light serves 4 functions: stop, turn, tail, and license plate light. Screw-on lens. Durable steel housing. Stud mount to trailer with included studs. 2-Wire design. (1) 1157 bulb.


Features:

  • Incandescent trailer light serves 4 functions
    • Stop, turn, and tail
    • Built-in license plate light illuminates trailer license plate
  • Incandescent bulb is easy to replace
  • Shock-proof socket protects bulb against damage
  • Durable steel housing with screw-on lens
  • Red lens over incandescent bulb
  • Compatible with 12V DC systems
  • Stud mount to trailer with included studs
  • 2-Wire design includes power lead and ground wire
  • DOT compliant


Specs:

  • Configuration: driver side
    • Passenger side: ST20RS (sold separately)
  • Dimensions: 3-7/8" diameter x 3-1/16" deep
  • Distance between mounting holes (center on center): 2"
  • Bulb type: 1157
  • Power draw at 12.8V:
    • Stop/turn: 2.3 amps
    • Tail: 0.9 amps
  • 3-Year limited warranty


Optronics ST21 Series Surface Mount Tail Light Dimensions


ST21RS Optronics Trailer Tail Light - Stop, Turn, Tail, License - Surface Mount - Steel Housing - Round - Red Lens - Driver Side - Left Hand




California residents: click here


Video of Optronics Trailer Tail Light - Stop, Turn, Tail, License - Round - Red Lens - Driver 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 - ST21RS Review

Today, we're going to be reviewing Part Number ST21RS. This is the Optronics Trailer Light for the driver side. The round trailer light is going to serve as your brake light, turn signal, and tail light. It's got the built-in license plate light as well. It's got the red, acrylic lens. It's very simple to replace.

It attaches with the two included screws. It's going to feature the easy-to-change incandescent bulb that's going to sit in a shockproof socket for a long bulb life. It's got the black, enamel-coated steel housing. It's very durable and strong, as well as corrosion resistant. Here on the back, it's going to expose the two lead wires to connect your light, and it's going to ground through the mounting hardware. The mounting hardware is included.

It's going to surface mount using those two studs on the back of the housing. They just slide into the channels here, and then you can adjust them as needed to fit your application. This light is designed to extend out from the trailer. It is Department of Transportation compliant. Again, it's for the driver side. If you need a light for the passenger side, you can use Part Number ST20RS, and you can find that right here at etrailer.com.

This light is going to give us an overall diameter of 3-7/8", with an overall depth of 3-1/16". The bulb type is 1157 double filament. The power draw is at 12.8 volts, so for the brake light, it's going to use 2.3 amps, for the turn signal, it's going to use 2.3 amps, and for the tail light function, it's going to use 0.9 amps. When installed, those two studs here on the back are going to give us a measurement, center on center, 2" apart from one another. We're going to go and hook this up to our external power source, that way, you can see what it looks like with power running to it, and with our overhead lights turned off. The red wire is going to be for the tail function, so we'll go ahead and connect that.

Then the black wire is going to be for our stop and turn signal. You can see here that it's going to send out a nice, consistent signal. You got the license plate illuminator here at the base, and then when we apply there brakes, it's going to illuminate for a more consistent, even brighter signal. It's going to have that same function for the turn signal as well. That's going to do it for our review of Part Number ST21RS. This is the Optronics Trailer Light for the driver side. .


Customer Reviews

Optronics Trailer Tail Light - Stop, Turn, Tail, License - Round - Red Lens - Driver Side - ST21RS

Average Customer Rating:  4.6 out of 5 stars   (12 Customer Reviews)

3-7/8" Diameter round. Incandescent trailer light serves 4 functions: stop, turn, tail, and license plate light. Screw-on lens. Durable steel housing. Stud mount to trailer with included studs. 2-Wire design. (1) 1157 bulb.

- ST21RS
by:

The originals lasted 22 years of New Hampshire winters. They were a drop in replacement...no drilling differant hole patterns...in 22 years I'll be 83, guess I'll order the replacement then. 420712



- ST21RS
by:

Arrived just as ordered. Looks like a quality product. Dimensions given were correct. 700419



- ST21RS
by:

Items arrived sooner than expected, installed easily and looks and functions great. I will use etrailer again and recommend .Tammi was very helpful. Aloha from Hawaii 696569



- ST21RS
by:

Good product. Great seller 564575



- ST21RS
by:

Good product and fast shipping. I have used etrailer several times for different projects. I would recommend them to others. 441601



- ST21RS
by:

Product was fine. Adjustable slots helped. Time to ship was verrrry slow. Need to do better in that department. 414476



- ST21RS
by:

They fit perfect just as described. Thank you so much. 408650



- ST21RS
by:

Got the tires, wheels, lights, and wiring kit to rebuild an old utility trailer. The website has a wealth of info to help find exactly what was needed. Michelle S. was very helpful (and friendly!) in resolving a delivery question. 409272



- ST21RS
by:

Just got the correct product in three days. The salesperson helped me find just the right part as I am not an expert and was particularly nice and knowledgeable. I appreciated the help. 343124



- ST21RS
by:

Wonderful company to deal with. Will always update any information and provide suggestions. Will tell friends about service and good pricing.............george 338044



- ST21RS
by:

Easy installation---perfect fit on my trailer with fast shipping from etrailer. 238867


Comments
No problems-working well. Thanks for checking.
Gary W - 03/12/2017

22785

- ST21RS
by:

they work 184103


12
12

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Info for this part was:

Written by:
Tricia G
Expert Research:
Jameson C
Updated by:
Brian T

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