Finding a reliable round trailer light kit is essential for trailer safety and compliance on American roads. This guide highlights five top round LED trailer light kits, covering waterproofing, brightness, and ease of installation. Each option supports stop, turn, and tail functions, with wiring harnesses and mounting hardware included. Use this comparison to choose a kit that fits your trailer size, mounting preferences, and driving needs.
| Product | Brand | Key Features |
|---|---|---|
| 4″ Inch Round Led Trailer Tail Lights Kit | Jamarco | 2 round lights, 6 marker lights, 13.8″ 3rd brake bar, 25ft wiring, IP67 waterproof |
| Hopkins B55UW Round LED Stop/Tail Light | Blazer International | Metal housing, universal mounting, waterproof |
| LIGBT 4″ Round Kit | LIGBT | 2 round lights, 16″ light bar, 10 markers, complete setup |
| Nilight TL-18 4″ Round LED Lights | Nilight | 12 LED per light, high brightness, IP67 surface mount |
| RUNHWEE 2Pcs 4″ Round Kit | RUNHWEE | All-in-one 12 LED lights, 50,000-hour life, IP67 waterproof |
4″ Inch Round Led Trailer Tail Lights Kit
The Jamarco kit includes two 4-inch round LED stop/taillights with 24 LEDs each, plus six mini marker lights (red), a 13.8-inch 3rd brake light bar, and a 25-foot wiring harness with a 4-pin flat plug. The red lens provides bright signaling for stop and turn functions, while white ground wiring ensures proper circuit completion. The waterproof IP67 rating helps withstand sand, dust, rain, and snow. Mounting uses rubber grommets and standard trailer pigtails, with a typical drilling requirement for flush installation. Suitable for owners needing a complete ready-to-install package.
Hopkins Round Stop/Tail Light Kit (B55UW)
Blazer International’s Hopkins B55UW features a metal stop/tail/turn light with a black enamel steel housing and a universal mounting plate. The kit emphasizes a simple, sturdy setup suitable for RVs, boats, trailers, and utility vehicles. While it emphasizes durability and ease of use, it is noted for broad compatibility and a straightforward installation process. It provides essential lighting without extra markers in this configuration, making it ideal for users who prefer a minimalistic, rugged style. Built to operate in challenging environments with reliable waterproofing.
LIGBT 4 Inch Round Led Trailer Lights Kit
The LIGBT kit includes 2 round 4-inch lights, a 16-inch high-mount brake light bar, 10 mini marker lights, and 4 reflective stickers. It provides a complete lighting solution for trailers, with a compact 5.3-inch diameter for the round lights and precise marker dimensions. Installation is designed to be user-friendly: connect the lights to the vehicle wiring and mount using pre-drilled holes. The 11-LED 16-inch bar adds additional visibility for braking at longer trailer lengths. This kit targets users seeking a full lighting system in one package.
RIGID HITCH Round Economy Trailer Light Kit
RIGID HITCH offers an economy round trailer lighting kit designed for trailers under 80 inches wide. It includes incandescent tail lights and a 20-foot wishbone 4-flat wiring harness with a car end connector. This kit emphasizes a budget-friendly option with standard 1157 bulbs and a straightforward wiring setup. It does not include extra clearance or side markers, making it suitable for simpler trailers or those planning to upgrade markers separately. A practical choice for basic lighting needs and reliable compatibility with traditional bulb technology.
Nilight TL-18 4″ Round LED Trailer Lights
Nilight TL-18 lights feature 12 upgraded Piranha LEDs per light, delivering improved heat dissipation, wider illumination, and longer life. They offer three-core brightness control: high brightness for turn/brake, lower brightness for tail light, and a strong overall light output. Installation is simple via surface mounting with 4.3-inch hole requirements for grommets. The IP67 rating ensures protection against dust and water immersion, making these lights reliable in varied weather conditions. A strong choice for brightness-focused users who want significant visibility on the road.
RONSTA 4 Inch Round Boat Trailer Light Kit
RONSTA’s 4-inch horse round boat trailer kit provides a comprehensive setup with two round lights, six mini side marker lights, a 13.8-inch third brake light bar, and a 25-foot wiring harness with reflective stickers. It carries IP67 waterproofing and submersibility features to protect against water exposure common for boat trailers. The kit emphasizes bright LED diodes for enhanced daytime and nighttime visibility, and it is designed to maintain stability in challenging weather and water conditions. This kit suits boat and RV trailers requiring full signaling and markers in one package.
RUNHWEE 2Pcs 4″ Round LED Trailer Light Kit
RUNHWEE’s kit combines two 4-inch round lights with 12 LED bulbs each, offering an all-in-one lighting solution that covers parking lights, turn signals, tail lights, and brake lights. With IP67 waterproofing, the kit is built to perform in rain, snow, and dust. It emphasizes high-brightness LEDs (long life, up to 50,000 hours) and energy efficiency, making it a durable option for everyday trailer use. Installation is designed to be straightforward, with simple wiring and mounting steps for quick setup.
Partsam 4Pcs 4 Inch Round Led Trailer Tail Lights Kit
Partsam’s kit includes four 4-inch round LED trailer tail lights with red lenses and 12 LEDs per unit. The recessed flush-mount design uses grommets and pigtails for a clean installation, and the system is compatible with 12V DC. With IP65 waterproofing, these lights resist sand, dust, rain, and snow. The kit uses a standard 3-prong connector and provides a robust option for those seeking a sealed, flush-mounted look on their trailers, campers, or utility vehicles.
Buying Guide: Key Considerations And Comparisons
Purpose and compatibility: Confirm your trailer width, mounting space, and whether you need additional side markers or a third brake light. Some kits include markers and a long third brake bar, while others focus on core round lights only.
Waterproofing and durability: Look for IP ratings (IP65 to IP67) and submersibility if you regularly encounter rain, snow, or boat-trailer environments. Metal housings can offer extra ruggedness, while plastic housings save weight.
Brightness and signal quality: Higher LED counts and dedicated brake/turn brightness yield better visibility. Some kits separate tail light brightness from brake/turn intensity for safer night-driving signaling.
Wiring and installation: A complete kit with pre-wired connectors, mounting holes, and grommets simplifies install. Check for included wiring lengths and hardware compatible with your vehicle’s wiring system (4-flat, 7-way, etc.).
Maintenance and longevity: LED-based lights typically offer longer life and lower power consumption than incandescent options. IP67-rated units provide stronger protection against water intrusion over time.
Cost vs. value: While some kits are feature-rich with markers and bars, others emphasize essential signaling with a simpler installation. Balance upfront cost with long-term durability and the need for future upgrades.
Brand and warranty: Reputable brands often provide better customer support and warranty coverage, which is helpful if you encounter compatibility or performance issues after installation.