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Optronics


  • Optronics has been a leading supplier of trailer lighting for over 30 years
  • Meets the federal lighting requirements for trailers where applicable
  • Most lights are available in LED or incandescent





Optronics Reviews and Installation Videos



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Expert Answers about Optronics

  • Troubleshooting a 55-Watt Halogen Light part # QH36CTS that Doesn't Light Up When Powered
  • Is the black wire of the 55-Watt Halogen Light part # QH36CTS grounded properly? You can test the light by running a jumper wire from the red wire of the light to the positive post of a vehicle battery and then run the black wire to the negative post of the battery. If it works at this point the problem was the ground of your previous setup. If it is still not working the bulb could be blown, for a replacement bulb you would want an H3 bulb like the part # CM93395.
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  • Clear Lens Version of the Sealed, Mini Rectangular Trailer Utility Light # UL94CB
  • Yes, we do carry a version of the # MCL95AB with a clear lens. For that you would want the part # UL94CB.
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  • Availability of a Clear LED Trailer Clearance Side Market Light
  • The closest match we have to the mini rectangular LED trailer clearance trailer side marker light # MCL95AB is the Optronics sealed, LED mini utility light # UCL13C2PG. It's 2-1/2 inches long and 1-1/16 inches wide. Other potential options to consider: # MCL13CA2B # MCL63CAB # MCL65CAB # AL91CAB # AL82CRB I included an informative article and several video reviews too.
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  • Will LED Marker Lights Require Resistors On Trailer To Prevent Hyperflashing
  • If you install the Sealed, Mini LED Side Marker, Clearance or Identification Light, part # MCL13A2B into your running light circuit you will not need resistors. Hyperflashing may occur when installing LED lights for the turn signals.
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  • Replacement Lens For Tail Light On Eagle Trailer
  • In order to see if part # A8RB is the right replacement lens for your trailer tail light you can take a quick measurement. I have attached a photo of the # A8RB with the dimensions shown. As you can see the lens is 4-1/2 inches wide and tall and the mounting holes are spaced 3-3/4 inches apart. If you find that the # A8RB dimensions will not work for you, you may want to measure the dimensions of the lens you want to replace and let me know what they are. I will be glad to see if...
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  • Will LED Submersible Trailer Stop, Turn and Tail Light # STL8RB Fit Light Guard Tail Light # LG440NP
  • The Redline Unpainted Steel Light Guard, part # LG440NP, is designed to fit the Peterson square tail light, the square taillight 440 or the 440L. However I took some measurements of the Light Guard and the LED Submersible Trailer Stop, Turn and Tail Light, # STL8RB (see image) and I found that the light will fit. The light guard measures 5 inches tall and 5-1/2 inches wide, while part # STL8RB measures 4-3/4 inches square. More important the light has two studs on 2 inch centers, the same...
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  • What Does it Mean when a Trailer Light is Listed as Waterproof or Submersible
  • When it comes to trailer taillights the terms waterproof and submersible are somewhat interchangeable. If a taillight is considered submersible that means that the internal circuits are waterproof and would be protected for if you were to back the trailer into water like when launching a boat. The part # TLL56RK that you referenced is listed as waterproof and submersible so it would work great on a boat trailer. Lights that aren't waterproof or submersible will still work just fine...
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  • Heavy Gauge Trailer 4-Way Wiring, 16 Gauge
  • The longest 4-way harness we offer that has all 16 gauge wire is the Wesbar Harness part # W787274 which is 14 feet long. For one that is 30 feet long that has a 16 gauge ground wire and 18 gauge signal wires you would want the part # W002230.
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  • Optronics Trailer Lights # STL70RB and # LED Light Brightness
  • I spoke with my contact at Optronics and was informed that the Lumen difference between part # STL70RB and part # STL22RB LED stop, turn and tail lights is not tested by Optronics. I was told that the more LED lights in the tail light the brighter the light will be. I have seen these lights on display and these lights are very bright especially as compared to incandescent lights.
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  • Diameter of the Mounting Stud of the 55-Watt Halogen Area Utility Light # QH16CTS
  • I went and pulled a 55-Watt Halogen Area Utility Light # QH16CTS from our warehouse to measure the diameter of the mounting stud and found that it is .3 of an inch (or 5/16 inch) and the nut on the stud is .5 of an inch in diameter. So if you wanted to use this on your setup you would need to use a washer with a hole in the center of it that is about .3 inches in diameter and an overall diameter of about 3/4 of an inch.
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  • Can Sealed 4" Round LED Trailer Light # STL43RB Be Used Underwater in Saltwater Environment
  • I spoke with my contact at Optronics and in order to use the Sealed, 4" Round LED Trailer Stop, Turn and Tail Light, # STL43RB, in the saltwater environment, you will want to use marine grease like part # L11404 on the Straight 3-Wire Pigtail Plug, # A45PB, and then seal around the plug with a silicone sealant like part # 0160297. This will help to prevent any water from getting into the light housing during the constant in and out of saltwater service that your boat gets.
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  • Troubleshooting Trailer Lights That Come Back on After Turning off 2001 Ford Windstar
  • It sounds like a ground and/or short circuit problem. What you will want to do is disconnect the trailer from the vehicle. Use a circuit tester like # 3808 to test the 4-Way on the vehicle side. If the signals are all coming through like they should, then you know the problem is on the trailer side. If the signals are not coming through correctly, the converter box could be bad. To test the converter, test the signals going into the converter from the vehicle. If those are correct going...
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  • Is Optronics Thin Line LED Trailer Clearance, Side Marker Light Waterproof
  • The Sealed, Thin Line LED Trailer Clearance, Side Marker Light, part # MCL75AB is sealed and waterproof and would work well on your boat trailer. This light measures 3-15/16 inches long X 1-1/4 inches wide X 7/8 inch deep. The mounts are spaced 3 inches apart. You will also need the bracket with plug for installing the # MCL75AB. For the black bracket base you would need to order part # A65PB, and for the chrome finish bracket you can order part # A67CB. I have also attached an installation...
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  • Replacement Round LED Stop/Tail/Turn Light for 4-1/2-inch Opening
  • It sounds like you are looking for a recessed-mount light such as Optronics Round LED Trailer Stop, Turn and Tail Light # STL42RB. This light has a 3-hole mounting flange that measures 5-1/2-inches overall diameter. The mounting holes are spaced on 4-1/4-inch centers. Other options in round red LED-type stop/turn/tail lights are shown on the link provided.
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  • Are Trailer Clearance Lights with Clear Lenses DOT Approved
  • I spoke to my contact at Optronics and he informed me that the Side Marker Light part # MCL65CAB is DOT approved. He said the color of the lens has no real bearing on whether or not it would be DOT approved. It has more to do with the color of the light when it illuminates, the brightness and the angle it can be viewed.
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  • What is the Amperage Rating for Marine-Grade, 12-Volt DC, Triple-Outlet Adapter
  • The triple 12 volt outlet # A-124M is rated for 15 amps total. It is fused inside of the end that plugs into a 12 volt outlet. It is a small cylindrical fuse. If you need more amperage then we have single outlet kit # RM-9332 rated for up to 20 amps.
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  • Hole Size Needed to Install Flush Mount Grommet for Trailer Clearance, Side Marker Lights
  • The Optronics Flush Mount Grommet for A91 and AL91 Series Trailer Clearance and Side Marker Lights # A91GB, will fit a hole that measures 2-7/8 inches across and 1-1/2 inches tall. You will want to round the corners for a snug fit. This rubber grommet gives shock mount protection that extends the life of the lamp. I have included a video review of this part for you to check out.
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  • Recommended Replacement Trailer Lights With Side Lights For Small Utility Trailer
  • We have just what you are looking for. I recommend the LED Submersible Trailer Stop, Turn and Tail Light, part # STL8RB. This is for the right side of the trailer and is a stud mounted LED light. It has the side marker light that illuminates when the running lights are powered. For the left side of the trailer you will want part # STL9RB. I have attached a product review video and have also attached a drawing that shows the dimension for these lights you can take a look at.
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  • Can Sealed, 3-Light Truck Trailer Identification LED Light Bar # MCL97RB be Mounted Horizontally
  • I spoke with my contact at Optronics and yes, the Sealed, 3-Light Truck, Trailer Identification LED Light Bar, # MCL97RB, can be mounted on the roof of your horse trailer. When mounted horizontally, the light will be visible from the rear of the trailer but won't be at the same intensity as if it was mounted on the rear of the trailer facing back. Please keep in mind that since the intensity of the light will be decreased when mounted on the roof, it will not meet DOT regulations.
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  • Turn Signal and Brake Lights Stop Working on Trailer When Headlights are On
  • This sounds like a ground issue. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare...
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  • What Kind of Light Is in the RV Porch/Utility Light # RVPL8C
  • The RV Porch/Utility Light # RVPL8C that you referenced uses a 10 watt halogen bulb that only draws .87 amps at 12 volts. While this light doesn't have an LED in it, it does draw a very small amount of voltage similar to one. We do not have a version of this light with an LED.
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  • Finding Replacement Lens for SAE ST1AP 04
  • SAE stands for the Society of Automotive Engineers. The SAE part number is not the part number of the light, it is just a number on the lens that means that lens has passed SAE guidelines. In order to try and locate a replacement lens for you, I will need the part number and the manufacturer of the light. This information is usually stamped on the housing. If you can not locate this information, please send me a picture and the dimensions of the lens and I would be happy to check...
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  • What Size Heat Shrink Tubing Should be Used with LED Trailer Tail Light STL37RB
  • You would need the heat shrink tubing for 18 to 14 gauge wire # DW05452 for trailer tail light # STL37RB. On a boat trailer I would not use crimp style connectors like butt connectors because the chance that a wire could pull out due to broken strands is enough of a deterrent for me personally. I would make the splices needed, then use some liquid electrical tape, # SWC50122, and follow that up with the heat shrink tubing. That would ensure a tight, waterproof connection.
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  • Can the OEM-Style Driving Light Kit be Installed Upside Down at the Back of a Truck
  • You can install the driving light kit # QH-16CT any which way you want so upside down would not be a problem. Please note these lights are not DOT approved as reverse lights, in part because they are so much brighter than regular reverse lights. You'd be blinding anyone behind you. But as long as you use the included switch so you can manually toggle them on and off then you should be fine.
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  • Can the OEM-Style Driving Light Kit be Installed Upside Down at the Back of a Truck
  • You can install the driving light kit # QH-16CT any which way you want so upside down would not be a problem. Please note these lights are not DOT approved as reverse lights, in part because they are so much brighter than regular reverse lights. You'd be blinding anyone behind you. But as long as you use the included switch so you can manually toggle them on and off then you should be fine.
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  • Installing Optronics Marker Light MC36AB on a 6 by 10 Foot Utility Trailer
  • Installing the amber, stud mount marker light # MC36AB from the Optronics trailer light kit # TL29BK will be pretty easy. On your 6x10 trailer, you will find the location you want to mount the light and drill a hole followed by another hole a 1/2 inch below the first hole you drill. Take the wire from the marker light # MC36AB and run it through the lower hole. Run the stud on the light through the second hole on top. Using a lock washer and nut to secure it to the frame. The wire...
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  • How to Fix Rapid Flashing Blinkers on a 2004 Chevrolet Express After Switching to LED Lights
  • I don't know how the lights affect the cruise control feature on your 2004 Chevy Express van; the two seem unrelated unless they are on the same fuse. But I can explain what is going on with the flashing lights. On some vehicles, if you switch to LED lights it sort of confuses the electrical system on the vehicle because LED lights draw much less power than incandescent lights. The vehicle basically behaves as if the bulb was burned out by rapidly flashing. This is called hyper flash...
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  • Replacement Taillights, Wiring and 7-Way Connector for Car Hauler
  • To fit the round 4-1/2 inch holes on your trailer for the rear brake lights you could use the # STL42RB as this will fit in that hole. For a pigtail harness you would also need # A45PB. For the side clearance lights you would need to enlarge the holes to 3 inch in diameter, use the # A55GB as a grommet and then use # MCL59AB for the lights and # A46PB as a wiring harness. For a replacement 7-way with 11 feet of wire for running new wire everywhere you would want the part # HM20248....
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  • Mounting Hole Dimensions of the Steel Armored LED Trailer Clearance and Side Marker Light # MCL86AB
  • The mounting holes of the Sealed, Steel Armored LED Trailer Clearance and Side Marker Light # MCL86AB are 3-7/8 inches apart measured on center. I attached a picture that has this and a couple other dimensions as well plus a review video. Manufacturers don't like having CAD drawings of their products floating around so we don't typically have access to them or post them.
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  • Recommended LED Clearance Light that is Red and Amber
  • The Optronics LED clearance light that is similar to # MC65RB, but will be amber and red, is the Optronics LED clearance light # MCL65ARB. This light is sealed, waterproof and is a surface mount. The dimensions are 3-15/16 inch length by 1-1/4 inch width by 7/8 inch deep. You will need a bracket and plug like # A65PB to complete the installation of the Optronics LED trailer light # MCL65ARB. Another option you may like is the LED clearance/marker light with a bracket and wire # MCL67ARB....
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