Nilight 4" Round Trailer Tail Light 2-Pack — Red, IP67 Waterproof 3030 SMD LEDs with Mounting Brackets

Nilight 4" Round Trailer Tail Light (2-pack) are bright, weatherproof LED taillights with mounting brackets engineered for reliable turn, brake, and tail signaling on 12V trailers and utility vehicles.

These compact red round taillights combine upgraded 3030 SMD LED chips, reinforced grommet design, and powder-coated metal brackets to deliver stronger illumination and a secure fit for trucks, trailers, RVs, boats, and work vehicles. The pair includes two 4-inch lenses, 3-prong plugs, and mounting hardware sized for a 0.39" round hole—built to resist vibration and outdoor exposure while making wiring straightforward.

How bright are these Nilight LEDs and what modes do they support?

The lights use 12 high-quality 3030 SMD LED chips per lamp, producing a high-output beam for turn and brake signals and a lower-intensity tail/marker mode for continuous visibility. Their wider beam angle provides better side visibility than many stock bulbs, enhancing recognition in traffic.

• 12 × 3030 SMD LEDs per light for increased luminous output
• Distinct brightness levels for brake/turn (high) and tail/marker (low)
• Wider light spread improves visibility from off-angles
• Controls via vehicle wiring using the included 3-prong connector

How easy is installation and what do I need to know before mounting?

Installation is designed to be straightforward for anyone comfortable with basic trailer wiring: fit the rubber grommet and light into the bracket, align the bracket to the vehicle hole, secure with the supplied hardware, then connect the three wires to corresponding vehicle circuits. Confirm your mounting hole diameter is 0.39" and your trailer uses a 12V system before starting.

• Round hole diameter needed: 0.39" (check before purchase)
• 3-prong plug for simple wiring hookups to turn/brake/tail circuits
• Mounting bracket and nut/screw included for a solid attachment
• Basic tools required: screwdriver, wrench, and wire connectors

What features keep these lights secure and weather-resistant?

Nilight improved the grommet geometry by adding interior notches and bulges to grip the taillight housing tightly, reducing the chance of the lamp loosening from vibration. The housing is heavily silicone-sealed and rated IP67, while the mounting bracket is metal finished with a black powder coat to resist rust and chipping.

• Upgraded grommet notches and three interior bulges for a shake-proof fit
• 3-prong plug designed for snug, reliable electrical connection
• IP67 silicone sealing for dust- and water-resistance
• Durable powder-coated metal bracket to resist corrosion

Which vehicles and applications are these Nilight lights compatible with?

These taillights are built to work across a wide range of 12V vehicle platforms where a 4" round light and a 0.39" mounting hole are appropriate. They suit commercial and recreational uses, from utility trailers and horse trailers to RVs, dump trucks, tractors, and boats (ensure wiring and mounting compatibility first).

• Universal 12V fit for trailers, trucks, RVs, tractors, and specialty vehicles
• Functions: brake light, turn signal, and tail/marker light
• Ideal for replacements, upgrades, or new trailer builds
• Confirm hole size and wiring scheme before installation

Who is this for? These Nilight 4" round LED taillights are aimed at trailer owners, fleet maintenance teams, and DIY vehicle builders who need a compact, bright, and weatherproof signaling solution. Choose this pair if you want an easy-to-install upgrade with improved vibration resistance, clearer signaling, and durable materials built to handle outdoor use.