If you’re upgrading from an incandescent setup, this single-LED round light is a solid step up in both brightness and efficiency. It uses just 0.33 amps for stop and turn signals and only 0.019 amps for the tail light at 12.8 volts. That means less power draw with a strong red output that clearly signals braking or turning. Plus, the LED design is more durable and energy-efficient than filament bulbs, so you won’t be replacing it anytime soon.
This light is sealed tight for wet conditions. The polycarbonate lens and housing form a waterproof unit that’s great for boat trailers or any setup that sees heavy rain or frequent washing. You don’t have to worry about moisture getting in and shorting out the circuit—the entire assembly is designed to stay dry inside even when submerged.
Mounting is straightforward thanks to the built-in black flange that lets the light recess neatly into a cutout. The overall diameter with the flange is 5-1/2", with a 4-1/4" light face that sits flush once installed. You’ll just need basic hardware to secure it since mounting screws aren’t included. The clean finish keeps everything tight and professional without extra brackets or adapters.
Wiring is simple and secure with the PL-3 connector setup. It works with 3-prong pigtails (sold separately), like the straight A45PB or right-angle A47PB, depending on your space. The locking connection on the back of the light keeps the plug from backing out over time, so you get consistent power whether you’re on rough roads or the water.
Safety standards matter, especially for lighting that signals braking or turning. This LED trailer light meets Department of Transportation and transport safety requirements under FMVSS 108 and CMVSS 108. It’s built to perform dependably under real use while keeping your trailer fully compliant on the road.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to be taking a look at part number STL003RFLB. This is the Optronics round LED trailer light. It's going to feature one LED. It's going to serve as your brake light, turn signal and taillight. It's going to feature a sealed waterproof housing, as well as a lens unit. Here on the back side, you're going to notice that it has the connection point for a three wire pigtail.
These tabs that come off of here are actually locking tabs, so once that connection is in there, that bracket or that housing on the back of the plug is going to lock in these brackets and that's just a safety feature, as well as a feature that's designed to prevent theft. It's going to clip on either side of the plug for a nice, tight, secure fit. This uses surface mount technology, which is designed to protect the LED from shock and vibration. The diode is actually mounted directly onto a circuit board instead of through a hole. It's going to feature a long lasting LED. It's going to be a great replacement for an incandescent light.
LED's are going to last 50 times longer, you don't have to worry about replacing bulbs. You don't have to worry about brittle filaments and LED's are going to be more efficient, so they're going to provide brighter light with less power output. It's going to feature a sturdy poly-carbonate lens, as well as a housing. This is Department of Transportation compliant, so it meets FMVSS 108 requirements and CMVSS requirements for automotive lighting. We'll take a look at the overall dimensions real quick. It's going to give us an overall diameter of 5 1/2 inches.
Now the actual light itself, or that lens, looks like it's going to be about 4 1/4 of an inch. The depth of this unit is going to be about 2 inches. You can see here that this is going to be a flange mount design, so it has that flange that goes around the housing. That's going to have three mount holes. If we take a measurement, the distance that we have center on center between each hole. That's going to measure 4 1/4 of an inch, and that measurement is going to be the same no matter how you measure, center on center between all the different holes.
So you have three different holes, center on center 4 1/4 is going to be the separation. Optronics is going to put a lifetime warranty on the LED. Again, you have the three prong connection here at the back. A couple different options that you have, it does not include the plug that you need, so you can find that here at etrailer.com. It is going to be sold separately, part number A45PB is going to be the one I'm using for our demonstration today, or you can get a right angled plug, with part number A47PB. I'm going to go and hook this up to our external power source, that way you can see what it's going to look like with power running to it. Simply just take our plug, run it through the guides there, that is locking tabs, straight into the connections. It's going to snap into place. You can see there that once that is fully connected, creates a nice tight seal around those connection points, so nothing is going to get in there and do any damage. This is going to be the taillight function. Again, this is just one LED. When we apply our brakes, you can see how that brightens up for a brighter signal output. It's also going to do that when we activate our turn signal. That's going to do it for today's review of part number STL003RFLB, this is the Optronics round LED trailer light. .
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
The light fit well as a replacement without having to modify the mount. I have not had any problems with the operation but the brightness was a little underwhelming.
Great service as always
The brake lights were installed, and they worked! The price was good, the service and delivery was good. No complaints all was good! :O)
Great product to replace incandescent lamps . Bright and easy to install . Great and easy shopping on website. Quick shipping and low cost shipping too! Will buy again when needed.
Lights worked perfect for my flatbed light upgrade,great price and this company has a nice easy to use website, i only wish they came with a gasket to go between the light and the mounting surface , but with that being said not all builds need to be water tight so i still guve it five stars
Doesn’t come with wiring harness, I was able to find a wiring harness plug that worked on Amazon that was much cheaper than what was quoted from a trailer.
Nice Product
Got this very quickly!!
received product in a timely matter, I am very happy with your services.
Great value. Perfect size. Easy to install. Dimensions were spot on.
Installed on the back of an old Jeep.
Only complaint is that the retention clips on the back are a little fragile, at least in the cold. A few snapped off but the plugs seem to hold well regardless.
There was some trouble with the manufacturer being back ordered, etrailer kept me informed and shipped as soon as they received the product, very good communication.
Bought to replace existing weathered lights in a heavy trailer. Looked the same as depicted but my frame around lens was metal ,not plastic like the ones I received. I will use them, exact fit, but I doubt they will take the abuse the original did over the years
Just opened box seams to be everything ordered,will install lights over weekend an see if all work ,will let you know.1994 gooseneck be comning new.
been working great for 1 year.
Led lights are the way to go.
No more bulb problems
Had a scratch on one of the lenses upon receipt. I notified e-trailer, they handled it right away sending q replacement. It’s nice to see that customer service does still exist. Thank you
Used these lights to upgrade to LED on my triple Axel equipment trailer. Lights are nice and bright. Would have given 5 stars except that since I have ordered these lights I have been bombarded with trailer light advertisements that just won't quit.
It worked for my burnt out light.I had to adjust some parts of the plug in but fit was perfect and changing to led lights are much brighter.
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