Replacement Tail Light for a Optronics ST-37 LH
Updated 02/03/2026 | Published 06/26/2024
Products Featured in This Question
Question:
I am trying to find a direct replacement for Optronics ST-37 LH. The ones on my boat trailer are incandescent and have a molded triangle shaped plug.
asked by: Terry W
Expert Reply:
The direct replacement for your Optronics ST-37 LH is the Aero Pro Combination Trailer Tail Light Driver's Side item # ST37RB and passenger side item # ST36RB. These do not have a molded triangle shaped plug so yours must have had that adapter added. It would be easy to swap the connector out when you replace your lights. You'll want to use the Deka Heat Shrink Butt Connector item # DW05744-5.
If you're interested in upgrading to the LED equivalent then the correct replacements would be the item # STL36RB and item # STL37RB.
Product Page this Question was Asked From
LED Tail Light for Trailers Over 80" Wide - 7 Function - Submersible - 17 Diodes - Passenger
- Trailer Lights
- Tail Lights
- Brake/Tail/Turn
- Marker
- Rectangle
- Surface Mount
- Submersible Lights
- LED Light
- 8L x 3W Inch
- Red
- Optronics
more information >
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Jerred H.
2/3/2026
Hey, how did the replacement tail lights work out on your boat trailer? Were you able to swap the connector easily when you installed them? Your update could make it easier for others replacing the same Optronics lights.