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If you’re tired of lights failing after a dunk in the water, this one’s built to take it. The Optronics Combination Trailer Tail Light uses sealed, waterproof construction that keeps water out of the housing and away from the bulb and sockets. It’s submersible, making it a dependable choice for trailers that see boat ramps or wet roads. The shockproof socket design also helps the 2057 incandescent bulbs last longer even with vibration and impact.
Instead of running multiple lights to meet safety requirements, this rectangular 8-1/16" by 2-7/8" tail light handles it all. It covers stop, tail, turn, rear clearance, rear reflector, side marker, side reflector, and license plate illumination—all in one housing. That built-in reflector means you don’t need to install extra reflectors on the trailer’s back or sides. It’s a clean, simple setup that keeps your wiring and mounting points tidy while staying compliant.

You don’t need special connectors or adapters to get this light working. It uses a straightforward 3-wire design that hardwires directly into your existing trailer wiring—two power leads and one ground wire. At 12.8V, it draws 2.3 amps for stop/turn and 0.9 amps for tail functions, so you know exactly what your circuit is handling. The included mounting studs make installation solid and durable, with a 2" center-to-center spacing for quick alignment.
When you’re replacing old or discontinued lights, finding an exact fit makes life easier. This Optronics ST17RB is a direct replacement for Wesbar #3504 and Peterson #M456L models, sharing almost identical dimensions—8-1/16" long x 2-7/8" tall x 2-13/16" deep. The included hardware means you can bolt it up right away without modification or guesswork. It’s a perfect match for anyone looking to refresh worn-out incandescent trailer lights with a proven design that just works.

Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
This is a replacement light for my boat. It was easy to install and works perfectly. Be sure to clean all your ground connections and use grease to prevent rust keep connections solid. The order was received as promised and in good condition. This company is my go to for parts of this nature.
i had a right light(itemst16rb) and i needed a left one (item st16rb)
i am putting tail brake and turn lights on a rack that fits into a 2in.
trailer hitch on my yukon thought it was a good idea
the right lite was one i purchased in 1993. i tried localy with no luck to
find a match for a left lite had no problem ordering one from E TRAILER
Installed easily in place of the old lights and wiring was simple. Will come back If I have occasion to need trailer lights again.
Carol C!! Very disappointed!! No nuts and bolts ho attach to trailer!! Had to cut off old ones so have none!! Also I m pretty sure when I went on line to inspected viewer and order there was a 2 plug in harness on wires which I wanted to continue water proof wire protection.?? Unhappy with product!!
It is good to get the item you order in a timely fashion..This boat trailer light location is vulnerable to damage, but highly visible. etrailer has a lot of products that I may need later. Good follow up and timely delivery. Thanks.
Fast shipping, exact fit replacement, works great.
Needed replacement tail lamps for cruiser lift motorcycle carrier, etrailer delivered as promised with the correct product. Paula, representative for etrailer is great to work with and helped immensley to match an exact replacement making the entire replacement a snap. Have ordered multiple items from this company and have never encountered any difficultites with ordering, delivery or products offered.
The tail light arrived fast and works g reat.
The tail light was an exact replacement for the original light and I received it in just a few days. It has worked as good as new since with no problems. I appreciate the follow-up too.

Ralph
4/17/2022
Its a new season and the light is working as well as when new.
Wow this is the most amazing company I have ever dealt with on line. I ordered 2 tail light fixtures for my boat trailer and I needed them quickly so I paid the 2 day shipping fee and I didn't receive them for like 6 days. So I told them I thought I should get a refund on the freight, oh and bye the way the fixtures were perfect and exactaly what I had ordered. This sweet lady said she would refund me the difference between regular shipping and my 2 day shipping and she did. As it ended up I got them soon enough that I got the trailer ready to roll when I was supposed too afterall. So will tell everyone I know to shop etrailer for any thing they need if they like being treated great. THANKS AGAIN ETRAILER
Tail lights came quickly and are working great. They were exactly the same as the originals. Thank you etrailer!

Roger T.
7/5/2018
Trailer lights still working well. Like them a lot just what I needed. Thank you.
these taillights were just what I expected. they did the job of replacing my old taillights.

Laddie
10/29/2018
still working just fine a year later
Accidently crushed one of my boat trailer lights, so ordered a new one from etrailer.com When I received it. it looked strange as the lens on the right one looked different than the left on the original pair. I initially was skeptical that it would work but after installation it worked fine. A note..the trailer is from 2005-2007 so the design my optronics may have changed. Having said all that. I would never order anything for my trailers except from etrailer.com. The folks there are great. The best thing is that almost anything you order, there is a video to tell you how to install it...what to look out for when installing...a lot better than having to guess or at best find a relevant YouTube video....
The two trailer lights came in and work but were not the exact same. Both were the same size but one light was only half as bright as the other and one had a window at the bottom to light up the road below it and the other one didn't. You should make sure both are exactly the same model.

Jenny N.
10/4/2022
You mentioned that one light was brighter than the other and I had a question that I wanted to ask. Is one light brighter than the other on a specific function? I recommend checking the grounds on the lights and the wiring as that may be affecting it. If that does not help, please contact us. You also mentioned that one light has the clear light at the bottom. This light is meant to illuminate the license plate and this is why is it not included with the passenger side light.
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I had to replace my boat trailer lights on my 1995 Sea Ray boat trailer. These were the perfect replacement lights for the matching of the existing ones. The mounting holes lined up perfect, no drilling required, just remove the old and install the new.
It took more time to connect the wires on each side than to mount the new lights.
etrailer had these to me in three days, and there were exactly as described and many choices to pick from. I don't use the boat all that much, If it were newer and I used the boat more I would have went with the LED model. Again and as usual etrailer was top shelf on the shipping and the price!! Thanks folks, I'll be back again.
Fast shipping, part arrived as predicted. The lights fit the application perfect. Great ordering experience, customer rep was very friendly and helpful. Definatly reccomend order from etrailer. *
i HAVE NOT RECIEVED THE TAIL LIGHT LENS I ORDERED
I broke an existing tail light on my boat trailer while backing up.. Replacement Was delivered on time. Easy hook up would recommend to anyone.
It was awesome! Perfection for my 2012 trailer. Thx!
Just like original !
It was the perfect light and installed so easily
Great waterproof replacement for one that the previous boat owner had installed that was not waterproof. Looks good, easy installation,except for having to destroy the existing one to get it off.
Great product
The installation went smooth
Very good tail light and product! Testet it before installing it and it worked! After installing it, check my turn signals, hazard signals, and breaks and completely solved my issue, that way, when I'm coming back, especially after dark, I avoid getting a ticket! Very good and satisfied with this product and etrailer customer service, will purchase from here again in the future if needed! Thank you etrailer service for a good working light for my trailer and got a fair deal!

Matthew M.
1/3/2024
Excellent product!
Good packaging and arrived quickly. etrailer is my go to place for anything trailer
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Thomas
2/9/2022
Still working great!