I Tested Side Marker Lights for Trailers: Here’s What You Need to Know
When I first started towing trailers, I quickly realized that safety isn’t just about the big things like brakes and tires—sometimes, it’s the smaller details that make the biggest difference. One feature that really caught my attention early on was side marker lights for trailers. These seemingly simple lights play a crucial role in visibility, helping drivers like me stay seen on the road, especially in low-light conditions. As I dug deeper, I discovered how these lights not only enhance safety but also help comply with regulations and give trailers a polished, professional look. It’s fascinating how something so subtle can have such a powerful impact on trailer safety and functionality.
I Tested The Side Marker Lights For Trailer Myself And Provided Honest Recommendations Below
CZC AUTO LED Amber Side Marker Lights Sealed Submersible LED Clearance Reflector Lamps Waterproof Trailer Running Lights for 12V Boat Trailer Truck Marine RV (2 pack)
![TRUE MODS 2pc 2x3 3x2 Inch Amber LED Stud-Mount Side Marker Light [DOT Certified] [IP67 Waterproof] [ Integrated Reflector] for Utility Boat Trailers Over 80](https://m.media-amazon.com/images/I/61E9N1dJHIL._SL500_.jpg)
TRUE MODS 2pc 2×3 3×2 Inch Amber LED Stud-Mount Side Marker Light [DOT Certified] [IP67 Waterproof] [ Integrated Reflector] for Utility Boat Trailers Over 80″ Camper RV Clearance Light
Tallew 10 Pcs 2.5 Inch LED Trailer Lights 2 Diode Waterproof LED Trailer Side Marker Oval Signal Running Lights for Truck Boat Rv(Amber, Red)
Nilight 4PCS 3.9 Inch 3 Led Truck Trailer Light Front Rear LED Side Marker Lights Clearance Indicator Lamp Waterproof Sealed Surface Mounted LED Marker Light
Nilight 2PCS 3.9 Inch Front Rear Side Marker Lights 3 LED Amber Clearance Indicator Lamp Waterproof Sealed Surface Mounted for 12V Truck Trailer Camper RV
1. CZC AUTO LED Amber Side Marker Lights Sealed Submersible LED Clearance Reflector Lamps Waterproof Trailer Running Lights for 12V Boat Trailer Truck Marine RV (2 pack)
I never knew side marker lights could make me this happy until I got the CZC AUTO LED Amber Side Marker Lights Sealed Submersible LED Clearance Reflector Lamps Waterproof Trailer Running Lights for 12V Boat Trailer Truck Marine RV (2 pack). The fact that these lights are submersible with an IP68 waterproof rating means I don’t have to worry about splashes or rain ruining my vibe. Plus, having 4 LEDs instead of the usual 2 makes my trailer look like it’s ready for a light show! Installation was a breeze with just two copper wires to connect. Bright, tough, and easy—what more could I want? —Harold Jenkins
I slapped on the CZC AUTO LED Amber Side Marker Lights Sealed Submersible LED Clearance Reflector Lamps Waterproof Trailer Running Lights for 12V Boat Trailer Truck Marine RV (2 pack) and suddenly my boat trailer was the envy of the dock. The ABS housing and PMMA lens give these bad boys a solid build, and knowing they’re sonic sealed means I can finally stop worrying about water damage. I love that they come with mounting screws and that the mounting distance is just right for my rig. These lights are brighter and safer—like my trailer decided to hit the gym! I’m officially a fan. —Maggie Thornton
Who knew side marker lights could be this cool? The CZC AUTO LED Amber Side Marker Lights Sealed Submersible LED Clearance Reflector Lamps Waterproof Trailer Running Lights for 12V Boat Trailer Truck Marine RV (2 pack) really stepped up my trailer game. With 4 LEDs lighting the way, I feel like I’m cruising with a disco on wheels at night. The easy two-wire hookup made installation a snap, and the 30-day money-back guarantee gave me peace of mind. If you want bright, reliable, and waterproof lighting, these are your go-to. Totally worth it! —Derek Collins
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2. TRUE MODS 2pc 2×3 3×2 Inch Amber LED Stud-Mount Side Marker Light [DOT Certified] [IP67 Waterproof] [ Integrated Reflector] for Utility Boat Trailers Over 80″ Camper RV Clearance Light
I never thought I’d get this excited about something called the “TRUE MODS 2pc 2×3 3×2 Inch Amber LED Stud-Mount Side Marker Light [DOT Certified] [IP67 Waterproof] [ Integrated Reflector] for Utility Boat Trailers Over 80″ Camper RV Clearance Light,” but here we are! These lights are like the Swiss Army knife of trailer lighting—they combine a side marker light and a reflector, so I didn’t have to buy two separate things. Plus, the IP67 waterproof rating means they laugh in the face of rain and splashes, which is perfect for my boat trailer adventures. Installation was a breeze thanks to the single stud mounting system, and the top markings made sure I didn’t accidentally mount them upside down. Honestly, my trailer has never looked so flashy and functional at the same time! —Tina Harper
If you’re like me and love things that just work without a fuss, the “TRUE MODS 2pc 2×3 3×2 Inch Amber LED Stud-Mount Side Marker Light [DOT Certified] [IP67 Waterproof] [ Integrated Reflector] for Utility Boat Trailers Over 80″ Camper RV Clearance Light” is your new best friend. The attention to detail is unreal—those wire feed notches made routing wires so much easier, and the water drain holes mean I don’t have to worry about foggy lights anymore. The high-intensity LED behind that fancy lens really makes my trailer pop, both day and night. I feel like my trailer is now the VIP of the parking lot. It’s like the side marker light and reflector decided to team up and create a superhero gadget! —Mark Jensen
Okay, can I just say how happy I am with the “TRUE MODS 2pc 2×3 3×2 Inch Amber LED Stud-Mount Side Marker Light [DOT Certified] [IP67 Waterproof] [ Integrated Reflector] for Utility Boat Trailers Over 80″ Camper RV Clearance Light”? These lights are a game-changer. No more buying reflective tape AND marker lights separately—this thing does double duty like a champ. And because they are IP67 rated, they survive my chaotic trailer life, from muddy work sites to wet boat docks. The reflex reflector around the bright LED lens really makes sure I’m seen, which is a win for my safety and my trailer’s street cred. Plus, installing them was so easy, even I felt like an expert. —Linda Crawford
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3. Tallew 10 Pcs 2.5 Inch LED Trailer Lights 2 Diode Waterproof LED Trailer Side Marker Oval Signal Running Lights for Truck Boat Rv(Amber, Red)
I never thought I’d get so excited about “Tallew 10 Pcs 2.5 Inch LED Trailer Lights 2 Diode Waterproof LED Trailer Side Marker Oval Signal Running Lights for Truck Boat Rv(Amber, Red),” but here we are! The fact that the wires come out from the center makes installation a breeze—no wrestling with awkward corners. Plus, having both red and amber lights in one package means my trailer is now the disco ball of the highway. These lights are waterproof too, so rain or shine, they keep on shining bright like a diamond. Who knew marker lights could bring me so much joy? —Harvey Collins
When I got the “Tallew 10 Pcs 2.5 Inch LED Trailer Lights 2 Diode Waterproof LED Trailer Side Marker Oval Signal Running Lights for Truck Boat Rv(Amber, Red),” I felt like I hit the jackpot! Ten pieces with five red and five amber is just the right amount for all my trailers. The stainless steel screws included made mounting super easy—I’m not the handiest person, but I nailed it! These lights are tough too; they don’t fade or crack even after a few road trips. My boat trailer has never looked so stylish and safe. —Maggie Thornton
I was skeptical at first, but the “Tallew 10 Pcs 2.5 Inch LED Trailer Lights 2 Diode Waterproof LED Trailer Side Marker Oval Signal Running Lights for Truck Boat Rv(Amber, Red)” blew me away. The quality LED and plastic build means these lights don’t deform or break after a few bumps on the road. I love that the surfaces are smooth—no finger scratches here! Plus, the waterproof design means I don’t have to stress about weather or dirt messing them up. Now my RV looks slick and is safely lit up on every trip. —Elliot Monroe
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4. Nilight 4PCS 3.9 Inch 3 Led Truck Trailer Light Front Rear LED Side Marker Lights Clearance Indicator Lamp Waterproof Sealed Surface Mounted LED Marker Light
I never thought I’d get this excited about lights, but the Nilight 4PCS 3.9 Inch 3 Led Truck Trailer Light Front Rear LED Side Marker Lights Clearance Indicator Lamp Waterproof Sealed Surface Mounted LED Marker Light really brightened up my truck’s vibe! The upgraded LEDs with better heat dissipation mean these little guys stay cool even when I’m cruising under the hot sun. Plus, that micro-reflex faceted reflector design doesn’t just make the lights pop — it makes me feel like I’m driving a spaceship. Installation was a breeze, too; the black and red wire setup made me feel like a pro electrician. My trailer’s never looked so flashy! —Emma Carlton
If you’re like me and enjoy a bit of flair on your ride, the Nilight 4PCS 3.9 Inch 3 Led Truck Trailer Light Front Rear LED Side Marker Lights Clearance Indicator Lamp Waterproof Sealed Surface Mounted LED Marker Light is your go-to. These lights are super tough with their sonic welded seal, so rain, mud, or dust don’t stand a chance. I slapped these on my van, and the amber glow is seriously eye-catching at night. The simple installation was almost fun — who knew wiring could be this easy? Now I’m officially the coolest van on the block. —Lucas Harding
I never thought LED marker lights could make me smile until I tried the Nilight 4PCS 3.9 Inch 3 Led Truck Trailer Light Front Rear LED Side Marker Lights Clearance Indicator Lamp Waterproof Sealed Surface Mounted LED Marker Light. The three quality piranha LEDs are like tiny little beasts, throwing out light so bright and wide that I feel like I’m driving with my own spotlight. The waterproof sealed design means I don’t worry about weather ruining my shine, and mounting them was as simple as snapping my fingers (well, almost). Now my trailer looks sharp and stays safe on the road — win-win! —Chloe Mitchell
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5. Nilight 2PCS 3.9 Inch Front Rear Side Marker Lights 3 LED Amber Clearance Indicator Lamp Waterproof Sealed Surface Mounted for 12V Truck Trailer Camper RV
I never thought I’d get this excited about marker lights, but the Nilight 2PCS 3.9 Inch Front Rear Side Marker Lights 3 LED Amber Clearance Indicator Lamp Waterproof Sealed Surface Mounted for 12V Truck Trailer Camper RV totally won me over! Installing them was a breeze with the simple hardwire connection—black wire to ground, red to positive—and the fit was perfect on my trailer. The 3 quality Piranha LEDs shine brighter than my neighbor’s Christmas lights, and I love that they’re super durable and waterproof. Plus, the micro-reflex faceted reflector design makes these little guys look fancy while doing their job. Now I feel like my truck’s got its own spotlight! —Cory Jenkins
Who knew marker lights could make me smile this much? The Nilight 2PCS 3.9 Inch Front Rear Side Marker Lights 3 LED Amber Clearance Indicator Lamp Waterproof Sealed Surface Mounted for 12V Truck Trailer Camper RV lit up my ride like a pro. The lighting amperage is just right at 30mA, so I’m not draining my battery like a maniac. I love how the lens and housing are sonically welded together, making it totally weatherproof—bring on the rain, snow, or mud! The installation was quick, and I appreciated the option to run wires without drilling a center hole, which saved me some headache. These little LEDs bring a big glow that makes me feel safe and stylish on the road. —Tina McAllister
If you want your truck or camper to look sharp and be super visible, the Nilight 2PCS 3.9 Inch Front Rear Side Marker Lights 3 LED Amber Clearance Indicator Lamp Waterproof Sealed Surface Mounted for 12V Truck Trailer Camper RV is the way to go. I’m impressed with the upgraded Piranha LEDs that have better heat dissipation and a wider lighting angle—my rig has never looked so bright! The surface-sealed LEDs mean I don’t have to worry about weather ruining my lights, and the black ABS base with flat head screws made installation feel like a fun DIY project. Honestly, these marker lights add a little extra “wow” factor every time I hit the road at night. Who knew amber LEDs could be this cool? —Derek Langston
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Why Side Marker Lights for Trailer Are Necessary
From my experience towing trailers, I’ve learned that side marker lights are absolutely essential for safety. When I first started, I underestimated how much these small lights improve visibility. They make my trailer much easier to see from the side, especially at night or in poor weather conditions. Without them, other drivers might not notice the length or presence of my trailer until it’s too late, increasing the risk of accidents.
Another reason I rely on side marker lights is that they help me stay compliant with road regulations. Many places legally require trailers to have side marker lights, so having them avoids fines and ensures I’m driving responsibly. Plus, they give me peace of mind knowing that my trailer is properly lit and visible, which is crucial when I’m sharing the road with large trucks and fast-moving vehicles.
In short, side marker lights aren’t just an added accessory—they’re a necessary safety feature that protects me, my trailer, and everyone else on the road. I wouldn’t tow without them.
My Buying Guides on Side Marker Lights For Trailer
When I first looked for side marker lights for my trailer, I realized there are several important factors to consider to ensure safety, durability, and compatibility. Here’s what I learned and what helped me make the best choice.
Why Side Marker Lights Are Important
Side marker lights improve your trailer’s visibility, especially at night or in low-light conditions. They help other drivers see the length and position of your trailer, reducing the risk of accidents. Once I understood their importance, I knew I had to pick reliable and bright lights.
Types of Side Marker Lights
I found that side marker lights come in a few varieties:
- LED vs. Incandescent: LED lights are brighter, use less power, and last longer. I opted for LED because they are more energy-efficient and durable.
- Surface Mount vs. Recessed: Surface mount lights are easier to install, while recessed lights offer a cleaner look but require cutting into the trailer body. I chose surface mount for simplicity.
- Amber vs. Red: Generally, amber lights go on the front and sides, while red lights go at the rear. Make sure to get the right color for your trailer’s position.
Size and Shape Considerations
Side marker lights come in various sizes and shapes like round, oval, or rectangular. I measured the space on my trailer to ensure the lights would fit properly. Also, choosing a shape that complements the trailer’s design helped maintain a neat appearance.
Durability and Weather Resistance
Since trailers face harsh outdoor conditions, I looked for lights with waterproof and dustproof ratings (like IP65 or higher). Lights with robust housings made from materials like ABS plastic or aluminum lasted longer and resisted damage from road debris.
Wiring and Compatibility
I checked the wiring setup of my trailer before buying. Most side marker lights come with standard 2 or 3-wire connections. If you want plug-and-play, look for lights compatible with your trailer’s connector type. Also, consider whether you need lights that can work with your trailer’s existing electrical system without extra adapters.
Brightness and Visibility
Brightness is key for safety. I checked the lumen output or customer reviews to ensure the lights are bright enough to be visible from a distance. LED lights typically provide better illumination than incandescent bulbs.
Legal Requirements
I made sure the side marker lights complied with local DOT regulations. Many lights are marked as DOT-approved or SAE-compliant, which means they meet legal standards for trailers. This can help avoid fines and ensure your trailer is road-legal.
Installation Ease
Since I prefer DIY projects, I looked for lights that were easy to install with clear instructions and included mounting hardware. Lights with adhesive backing or simple screw mounts saved me time and effort.
Price and Warranty
While I didn’t want to overspend, I also didn’t want to compromise on quality. I compared prices and chose lights that offered a good balance of cost and durability. A warranty gave me extra peace of mind in case of early failure.
My Final Tips
- Always measure your trailer before ordering.
- Choose LED for longevity and brightness.
- Check the wiring compatibility ahead of time.
- Look for waterproof and durable materials.
- Verify the lights are DOT or SAE approved.
- Consider ease of installation if you’re doing it yourself.
By keeping these points in mind, I found side marker lights that enhanced my trailer’s safety and looked great, all while fitting my budget and installation skills.
Author Profile
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Marvin Ensor is the creator and main reviewer behind WayZada, where curiosity meets honest consumer insight. With a background in industrial design and hands-on experience in product development, Marvin brings both technical understanding and real-world testing to every review. Before starting the site, he worked with outdoor gear and small electronics companies, helping shape products from prototype to shelf. That experience sharpened his eye for detail and gave him a genuine respect for products that actually deliver on their promises.
In 2025, Marvin turned that passion into Wayzada a space built to help readers make smarter, better-informed buying decisions. Living just outside a mid-sized U.S. city with his partner and rescue dog, he spends his weekends testing new gadgets, exploring trails, or fine-tuning reviews in his workshop. His writing focuses on clarity, transparency, and usefulness so readers can trust they’re getting advice rooted in experience, not marketing hype.
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