Recommended 7" Round Surface Mounted Tail Light
Updated 10/19/2026 | Published 10/16/2026
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Question:
I contacted your associates this morning regarding your tail lights for my vintage trailer your ST90RB. Your people tell me these will not work on my trailer for stop-turn and tail lights, they recommend the ST24RB, that is actually the same bulb and wiring. ??? Theses are virtually no different. Your reviews say the ST90RB works great for these trailers, yet you have conflicting information, and your people are saying these will not work. Can you please, have a REAL EXPERT answer this question ? thanks.
asked by: Dan C
Expert Reply:
Welcome back Dan. I went straight to Optronics to confirm that their Transit Tail Light item # ST90RB does indeed have turn signal functions.
The Transit Tail Light item # ST90RB has a simple two wire connection method. The black wire is the tail light and the red wire is the stop and turn signal circuit.
The Transit Tail Light item # ST90RB is a surface mount light that is sold individually. It measures 7-1/8" diameter with 6-1/4" mounting hole spacing placed at the 3, 6, 9, and 12 o'clock positions.
What vintage trailer do you have? Feel free to answer this and throw in any other questions you have, where it says Add Comment.
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Product Page this Question was Asked From
Optronics Transit Tail Light - Brake and Tail Light - Incandescent - Surface Mount - Round - Red
- Trailer Lights
- Tail Lights
- Brake/Tail/Turn
- Round
- Surface Mount
- Non-Submersible Lights
- Incandescent Light
- 7-1/8 Inch Diameter
- Red
- Optronics
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Dan C.
10/19/2026
Thank you Jerred. Etrailer may want to revise their information, I am sure it is costing sales on these item. It was just very conflicting, and the Etrailer associates I contacted relayed the same misinformation. I have a 1964 Traveleze, came with the wedding cake lights.