Replacement Light Bulb For Optronics Square Trailer Tail Light # ST2RB

Updated 08/05/2025 | Published 02/16/2016

Products Featured in This Question

Replacement Light Bulb # 1157

(79)

$2.56

Tail Light for Trailers Over 80" Wide - 7 Function - Incandescent - Square - Passenger Side

(264)

$15.98

Question:

Re: Optronics ST2RB There are 2 bulbs in this combination trailer tail light. What are the replacement bulb numbers? Thank you

asked by: Al R

Expert Reply:

The standard light bulbs in the # ST2RB light is part # A1157B.

This bulb features 8.3 watts for the tail light function and 26.9 watts for the turn and brake light function.

expert reply by: Jeffrey L

John

8/2/2025

What's the second Bulb, He asked about the 2 bulbs ??

Lazer S.

8/4/2025

@John Good call, John! The main light is the aforementioned 1157 bulb # A1157B, but the side marker is a 168 bulb # SY32JR (which is a 2 pack). I am having that updated on our site currently. Not sure how that got overlooked for so long. Did your side marker burn out?

John

8/5/2025

@LazerS actually was getting mulch loaded on my carry-on trailer from Tractor supply and etrailer was the only one that had anything that resembled their taillight. Just the side maker and bulb were broken. I am saving this link so If I ever need a replacement I know where to go. Thank you John