Nilight 4" Round Trailer Tail Light 4-Pack, Red 24 LED, IP67 Sealed Stop/Turn/Running

The Nilight 4" Round Trailer Tail Light 4PCS is a sealed, high-output red LED tail light set designed for trailers, trucks, and utility vehicles to provide clear running, brake, and turn signaling.

These compact 4-inch round lights pack 24 high-brightness SMD LEDs into each housing and combine a transparent lens with robust heat dissipation for consistent visibility. Built to fit common flush-mount setups, the lights offer dual brightness modes and an IP67-rated sealed assembly so they withstand rain, mud, and road spray. The kit includes four identical lamps and is wired for simple three-prong connection to standard 12V DC vehicle circuits.

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

Each lamp contains 24 SMD LEDs engineered for strong output and better thermal performance than conventional bulbs. The two-level output uses a lower intensity for running/tail illumination and a higher intensity for stop/brake and turn signalling so following drivers can perceive state changes quickly.

• 24 red SMD LEDs per light for intense, uniform illumination
• Low brightness mode for continuous running/tail light use
• High brightness mode activates for braking and turning to increase visibility
• High-transparency lens improves perceived brightness and beam spread

What mounting and wiring steps are needed to install these 4" round lights?

Installation is a straightforward flush-mount process: cut the specified hole, insert the rubber grommet, seat the lamp, and use the supplied 3-prong plug to connect to your vehicle wiring. The lights fit common trailer and truck panels once a 4.57" diameter recess with 1.89" depth is prepared.

• Required hole size: 4.57" diameter and 1.89" depth for proper flush mounting
• Install rubber grommet first to protect wiring and hold the light securely
• 3-prong plug simplifies wiring to 12V DC stop/turn/tail circuits
• No special tools beyond standard hole saw and basic hand tools

Are these lights durable against weather and road conditions?

Nilight designed the housings and lenses to be ultrasonically joined and sealed to achieve an IP67 waterproof rating, so each unit resists dust ingress and can be submerged briefly. The sealed rear plug and robust lens prevent moisture and contaminants from compromising the LEDs, making the set suitable for harsh outdoor use.

• IP67 rating: dust tight and protected against immersion up to 1m
• Ultrasonic bonded lens and housing for a tight seal
• Resilient against road spray, mud, and salt-affected environments
• 3-prong sealed plug helps maintain water resistance after installation

Who is this for? This Nilight 4" Round Trailer Tail Light 4PCS kit is a practical upgrade for trailer owners, pickup drivers, farm and utility vehicle operators, and boat trailers who need reliable LED running, brake, and turn lighting. It suits anyone replacing worn incandescent lamps, building a custom lighting panel, or outfitting commercial trailers that require clear signaling and weatherproof performance. Choose this set when you want a compact, highly visible light with simple flush-mount installation and durable IP67 protection for year-round road use.