4 in Round LED Trailer Tail Lights Kit - Complete 25ft Harness

In this review the kit is judged as a practical, all-in-one lighting solution for 12V trailers and utility vehicles. The package includes two 4 in round LED stop/turn/tail lights, six mini marker lights, a 13.8 in 3rd brake identification light bar and a 25 ft 4-pin wiring harness, so the single biggest reason to buy is convenience: everything needed for a basic trailer exterior lighting upgrade ships together. The workmanship and brightness stand out, while installation practices and wiring clarity are the main things a buyer should expect to manage.

Key Features

• Complete kit: Contains two 4 in round stop/tail/turn lights, six mini side marker lights, one 13.8 in third brake light bar and a 25 ft 4-pin harness so users rarely need extra parts.
• Triple-function round lights: Each 24-LED round lamp serves as stop, turn and tail light, providing clear, multi-function lighting from one fixture.
• Grommet mount design: The round lights use a rubber grommet mount and standard 3-prong pigtails for a flush appearance and secure fit when installed in a properly drilled opening.
• Wiring clarity: Color-coded leads clarify connections - white ground, red for high-brightness stop/turn and black for low-brightness tail - reducing guesswork during hookup.
• Weather resistance: IP67-rated fixtures are built to resist dust and water, making them suitable for trailers, campers and other outdoor equipment exposed to the elements.
• Universal fit: Designed for most 12V vehicles and trailers, the kit works with trucks, campers, tractors and boats that accept standard trailer wiring.

Who It's For

This kit is best for DIY trailer owners, small fleet operators and weekend haulers who want a single purchase that covers rear lighting and marker needs. It suits those who already have basic wiring knowledge or the patience to follow the color-coded wiring tips to hook up tail, stop and turn functions.

It is less appropriate for buyers seeking plug-and-play, bezelless mountings or for installations where the exact mounting hole size cannot be accommodated; the round lights require a flush fit with a roughly 4.5 in hole for the grommet ring. Buyers uncomfortable with wiring may prefer professional installation.

Pros & Cons

Pros

• Bright, multi-function 24-LED round lights provide strong visibility for stop, turn and tail uses.
• Everything needed is included in one box, saving trips for additional parts.
• IP67 rating and rubber grommet mounts give a weatherproof, tidy appearance once installed.
• Clear wiring colors and a long 25 ft harness simplify common trailer wiring runs.

Cons

• Installation can be confusing for some users and may require drilling a 4.5 in hole to achieve a flush fit.
• Round lights need compatible mounting depth and hole size, which may not suit every trailer without modification.

Specifications

Kit contents	2 round LED lights, 6 mini marker lights, 13.8 in LED bar, 25 ft harness, 4 reflectors
Round light diameter	Approx. 5 in with 4 in inner diameter
Round LED count	24 LEDs per round light
Third brake light	13.8 in red bar, 15 LEDs
Wiring harness	25 ft with 4-pin flat plug
Mount type	Rubber grommet mount and surface mount for bar
Ingress protection	IP67 waterproof

Our Verdict

This lighting kit is a solid value for trailer owners who want a single purchase to cover rear lights and markers; its bright LEDs, IP67 protection and complete harness make it reliable for typical 12V trailers. Buyers who can drill a flush mounting hole and handle basic wiring will find the kit dependable and cost effective; those wanting fully plug-and-play replacement bezels may need a different solution.

Frequently Asked Questions

Do the round lights require drilling?
Yes, the round lights are designed for a grommet flush mount and you may need to drill about a 4.5 in hole for proper fit.

What do the wire colors do?
White is ground, red is the high-brightness stop/turn/brake circuit and black is the low-brightness tail/running light.

Will this kit work on my 12V trailer?
The kit is universal for most 12V trailers, campers and trucks, provided the installer can accommodate the mounting dimensions and has a standard 4-pin trailer plug.