Nilight 4" Round Trailer Tail Light Pair — Red 24-LED, Flush-Mount, IP67 Sealed

Nilight 4" Round Trailer Tail Light pair: two 24-LED red lights that serve as running, brake, turn and tail lamps with dual-brightness modes and IP67 sealing.

These compact round trailer lights combine concentrated SMD LEDs, a clear lens and a rugged sealed housing to deliver highly visible signaling for trailers, trucks, tractors and boats. Designed for easy flush-mount installation and weather resistance, the lights aim to improve visibility to following drivers while fitting common 4" mounting cutouts.

How bright are these lights and what do the two brightness levels do?

The pair uses 24 high-efficiency SMD LEDs per lamp behind a transparent lens to maximize output while managing heat. A low-brightness mode provides continuous running illumination, while the high mode is instantly brighter for braking and turning so vehicles behind can notice changes.

• 24 red SMD LEDs per light for strong, even output
• Low mode for tail/running visibility
• High mode for brake and turn signaling
• Transparent lens for improved light transmission

What does the IP67 rating mean for use in bad weather?

IP67 sealing indicates the lights are protected from dust ingress and can withstand temporary immersion in water, which is ideal for exposed trailer and marine environments. The ultrasonic-bonded lens and housing create a tight seal when the rear plug is fully seated, reducing the risk of moisture-related failures.

• Ultrasonic-sealed lens and housing to block dust and water
• Rear plug designed for a secure, weatherproof connection
• Suitable for rain, splashes and brief submersion
• Built for harsh road and coastal conditions

How do I install these 4" round tail lights?

Installation is a straightforward flush-mount process: cut the specified hole, fit the rubber grommet, seat the light body into the opening, then attach the 3-prong connector and wire the three leads to your vehicle. The lights require a 4.57" diameter hole and 1.89" depth for proper fitment.

• Required mounting hole: 4.57" diameter, 1.89" depth
• Comes with grommet for flush mounting
• 3-prong plug for quick electrical connection
• Designed for 12V DC vehicle electrical systems

Which vehicles and applications are these lights suitable for?

These lights are made to work with a wide range of 12V vehicles where compact, sealed signaling is needed. Typical applications include trailers, trucks, tractors, RVs and boats where running, stop, brake and turn functions are required in a small round form factor.

• Fits trailers, dump trucks, horse trailers and travel trailers
• Compatible with tractors, semi-trailers and special-purpose vehicles
• Usable on boats where waterproof signaling is required
• Works with standard 12V DC vehicle systems

Who is this for? If you maintain trailers or small commercial vehicles that need reliable, compact rear signaling with simple installation and strong weather protection, this Nilight 4" round 24-LED tail light pair is suited to your needs. It fits owners and fleets seeking visible, low-maintenance lights for daily hauling, seasonal use or coastal environments where water resistance matters.