Backing up in the dark doesn’t have to be a guessing game. This 4-5/16" round Optronics LED backup light uses 10 white LEDs behind a clear lens to throw a clean, bright light where you need it. At 24 volts, it only draws 0.260 amps, delivering strong illumination with minimal power use. The multi-diode design optimizes output so you get full, even coverage instead of hot spots or dim edges.
Rain, washdowns, or full submersion won’t slow this light down. The sealed, waterproof, one-piece molded housing and durable lens keep water and corrosion out. Its water-blocking construction works with a weatherproof plug connection on the back for a secure seal against moisture. Whether it’s exposure to road spray or repeated dunking, the LEDs stay protected and shining bright.
Installing this light is simple and solid. It mounts flush using a grommet (A45GB – sold separately) and connects through a weathertight plug that locks moisture out. Once in place, the fit is clean and low-profile—no bulky housings sticking out or snagging on gear. With no bulbs to replace and no fragile filaments to break, you can set it up once and count on it for years.
You can count on this light to meet lighting standards across any installation angle. It’s DOT compliant and meets FMVSS 108 requirements in any 360-degree position when used as a pair in a 2-lamp system. That means dependable performance that keeps your setup safe and legal wherever you go.
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 BUL11CM24B. This is the Optronics LED backup light. This is going to work well on a trailer or utility truck. It's going to provide a white reverse light. This is certified for backup light function when installed as a pair in a two-lamp system. The unit's designed for 24 volt system.
It's going to feature long-lasting LEDs. LEDs are going to make a great replacement for incandescent lights. It's got the multi-diode design so it's really going to help optimize your light output. You don't have to worry about replacing bulbs or brittle filaments and the LEDs are going to be more efficient which means they're going to provide brighter light while using less power. This unit's going to feature a nice sealed water-proof one-piece molded plastic housing and durable lens. It's going to feature a corrosion resistant design, very strong construction, water-proof connection here on the back of the light.
So it's going to use a water-blocking design. This is going to help keep moisture out. So the plug that goes with this system is going to be available and sold separately part number AL45PWTB and that goes right inside this connection point there. It's got the locking tab on one end to provide the nice, tight, secure connection. It does require a mounting grommet and the plug for complete installation.
Those items are sold separately and you can find both of those on our website. It's SAE and Department of Transportation compliant. It meets FMVSS 108 requirements in any 360 degree position. We're going to go ahead and take a look at a few of the measurements real quick. First thing's going to be the diameter of the light measuring from edge to edge. That's going to give us a measurement of about 4 and 5/16ths of an inch.
We'll take a measurement of the depth from the front of the lens to the back of the plug. We're going to be looking at 1 and 5/8ths of an inch. We just measured the thickness of the lens, we're looking at about 7/8ths of an inch. This light's going to contain 10 LEDs or 10 diodes, so again, the multi-diode design is really going to optimize our light output. It's going to give us a nice white light coming through the clear lens. It's going to allow a lot of light to come through. It's a flush runner installation with that grommet that's sold separately and Optronics is going to put a lifetime warranty on the LEDs. That's going to do it for today's review, part number BUL11CM24B. .
Ratings & Reviews
Lights were easy to install. Twenty minutes and both backup lights were done.
The pictures speak for themselves !! Couldn't be happier Just gotta get the taillights that match now. STL190RB
These reverse lights dress the back of of our flat beds nice and there real bright.
The lights are much brighter than the originals and the installation was easy. The website is easy to navigate and the service was fast.
Replaced your OEM lights with up to date clarity and the same fit with no hassle!
Perfect fit 2017 Georgetown xl 369ds
LOOKS 100% Better ! Ty
unimaginable improvement from one ancient and lackluster incandescent bulb to 10 LED diodes-requires modification of hole but is fairly simple and worth the effort-I used it as the porch light on my '72 airstream reno-great result!
These lights are great. They light up much better than the stock incandescent bulbs that were in my ranch hand bumper. I can see great when backing my truck up now. They also fit better than the original bulb housings.
They look good just bought them as spar es
Great and perfect replacement for the backup lights in my headache rack.
Not to bright i guess they will do
the light fixture works very good except when used in the bracket, it leaves the back exposed to being hit by road debris. There is no cover on the light fixture. Therefore i went to a local fabricator and he made a fixture out of 2x4 steel tubing. The gasket fit perfectly but when i went to us the 2 wire pigtail, it was at the wrong angle for the light. I purchased another one locally. just wanted you to know that i could only use the light and the gasket.
Thank you for your prompt service.
Nice & bright - should definitely provide more light when backing at night vs. the old incandescent bulb.
These lights have been an outstanding upgrade from the original incandescent brake/turn/tail/reverse lights on my department's 1992 water tanker. The diodes in the lights are really bright and can be seen clearly at nighttime or during the day. 10 out of 10, would recommend!
I purchased this Optronics LED Backup Light to supplement the amount of reverse light that the T Bargman LED taillights provide. I installed them on a 1991 Ford E450 21 passenger church bus. This light is intended to be installed in a steel trailer frame with a rubber grommet which I did not order. I did not realize that a grommet was required. I probably would have ordered the grommets just in case I needed them but it was not made obvious to me on the website or recommended that I may want to consider including them in the order. After receiving the package and examining the light I realized that there was no way to secure the light into place without something. I went back to the website and looked up the light again and drilled down to the bottom and there it was, the grommet that I needed. Why didn't the site make the recommendation more obvious or suggest this part before ordering like it did with the wiring lead...? I was able to still make the lights work, it just took a little bit of planning which was required anyway with this custom retrofit application. I cut a precise hole into the fiberglass so that I could recess the light, which was my original plan even before realizing that the light required a grommet. I recessed the light in the hole and glued it in place with silicone. Time will tell if this was a good idea or not. I wish that I would have ordered the elbow wiring leads in stead of the straight ones. I ran into a clearance issue with the straight lead and had to modify them as well.
I purchased these Submersible LED bulbs for my boat trailer for two reasons. The first is so road traffic is aware of my intentions of backing up and the second is to make it easier to back my trailer into my driveway at night. The only thing that I find disappointing about this product, is that the wires are not sealed. You have to plug a pigtail in to power the bulb. Although they say it is watertight, I still plan on sealing the plug with some marine grade silicone sealant. Otherwise I am very satisfied with the way these bulbs light up my path of travel.
Product exactly as needed. Existing lamps last about 8 to 10 weeks as docking lights on my motorhome; there are four - one at each wheel. These lamps fit perfectly and are much brighter. My expectation is that these lamps will last more than a year(?) We'll see.
These Lights were a perfect fit for my RV. They easily fit over the OEM flush mounted incandescent lights that were very dim by comparison. The soft rubber gasket that came with them made installation very easy and watertight. As you can see in the picture, I replaced both my brake & back-up lights. I've had several compliments on their looks by people that saw my RV before I installed these too! But most of all, I'm very satisfied with the huge increase in brightness when I need it. I would recommend these for any do-it -yourselfer out there to upgrade existing trailers, or for something you're building!
Nice lights. I have the 36 diode oval LED lights mounted on a flatbed truck as reverse lights and they are not near as bright as these 10 diode lights. I have the 10 diode lights mounted inside a 6ftx20ft stock trailer on a toggle switch. There is one at the front and one at the back. They give off plenty of light to load and unload horses and cattle in the dark. I would buy these again for the next trailer I rebuild. The team at etrailer.com is top notch as well. Your order will ship the same day and arrive in a timely manner. If it does not they will tell you why. Great people to do business with.
Just what was needed to brighten up the rear of my horse trailer when loading and unloading in the dark
Perfect replacement for the reverse lights on boat trailers. A better buy than ordering from the trailer company.
With several of the MCL31 clearance I had half or all of the LEDs stop working. I did not at the time realize they had a lifetime guarantee so I just threw them away. When A bunch of the LEDs in both BUL52CBs and about half of the turn/stop LEDs in the STL37RB went out, I contacted etrailer and they happily replaced them, but it took a couple of weeks and I had to pay the shipping. When I replaced all of my trailer lighting, I had thought that I would never have to worry about it again. LEDs should last forwver. That turns out to not be the case and it is a lot harder to change out hard wired LEDs than socketed incandescent bulbs. I wish I could find reliable long lasting LED trailer lighting.
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