Nilight 4" Round LED Trailer Tail Lights 2-Pack Red with Mounting Brackets — Dual-Mode Brake/Turn & Tail, IP67

Nilight 4" round LED trailer tail lights are a 2-piece kit that delivers bright dual-mode red lighting for tail, brake, and turn functions with durable mounting brackets and rubber grommets for secure 12V installation.

These compact 4-inch round lights combine 12 high-efficiency 3030 SMD LEDs per lamp with a sealed housing and upgraded grommet design to provide reliable visibility on trailers, trucks, RVs and other 12V vehicles. The kit includes two lights, two brackets, a 3-pin connector with attached wiring, and round rubber grommets so you can choose surface- or grommet-mounting depending on your vehicle's panel. Rated IP67, they resist moisture and dust while the powder-coated metal brackets minimize corrosion.

How bright are these lights and what modes do they support?

Each lamp uses 12 upgraded 3030 SMD LEDs that run in two brightness outputs. The higher output functions as brake and turn signals and the lower output serves as a tail light setting for continuous illumination.

• 12pcs 3030 SMD LEDs per light for increased lumen output.
• High and low brightness modes for brake/turn and tail use.
• Wider beam angle and improved heat dissipation for longer LED life.

How do I install these on my trailer or vehicle?

Installation is straightforward whether you use the rubber grommet for flush mounting or the bracket for surface mounting. The kit provides a 3-prong plug with wires and hardware so you only need to match the wires to your vehicle’s 12V harness.

• Round mounting hole diameter: 0.39” for bracket screw alignment.
• Grommet hole for flush mounting: 4.46” diameter with 1.87” depth.
• Tail light size with grommet: 5.3” diameter, 1.87” depth to fit common panels.
• Connect three wires to corresponding vehicle wires; tighten bracket nuts securely.

Will these lights hold up to weather and vibration?

The lights are silicone-sealed with an IP67 waterproof rating and employ an upgraded grommet that locks the light into place to resist vibration. The mounting bracket uses a black powder-coated metal finish to reduce corrosion and wear.

• IP67 rated housing protects against rain, dust, and temporary immersion.
• Grommet notches and three retention bulges prevent the lamp from falling out.
• Shake-proof 3-prong plug and secure bracket attachment minimize loose connections.

What vehicles and systems are these compatible with?

Designed for universal DC 12V systems, these round LED lights work as combined tail, brake, and turn signals across a wide variety of trailers and service vehicles. Confirm panel hole dimensions before installing to ensure a proper fit.

• Compatible with trailers, trucks, RVs, horse trailers, dump trucks, boats (12V), and more.
• Works with 12V DC systems only; confirm electrical compatibility prior to installation.
• Check round hole and depth to ensure grommet or bracket fit.

Who is this for: The Nilight 4" Round LED Tail Light 2-pack is ideal for trailer owners, fleet operators, and DIY mechanics who need compact, weather-resistant rear signaling with easy installation and bright dual-mode LEDs. If you want a durable upgrade that fits common 4–5" mounting openings and provides clear brake, turn, and tail light visibility on a 12V system, this kit is a practical, value-focused choice.