Nilight 2-Piece Steel Trailer Light Box Kit — Preassembled 6in Oval Tail, 2in Amber Side Marker & License Light

How does this kit simplify trailer tail light installation?

The lights come already mounted in the steel housings with pigtail wiring, so you won’t be wiring individual lamps into separate enclosures. That saves time on assembly and aligns cutouts and mounting points for a tidy, secure fit.

• Comes as two pre-cut steel boxes with installed lights and rubber grommets.
• Hardwire three colored pigtail leads (red/black/white) to your trailer harness.
• Can be welded or bolted to rear, side, bottom, or top frame locations.

What are the brightness and LED specifications?

The kit uses SMD LEDs sized per lamp type to provide high-brightness stop/turn signals and lower-brightness running lights. The oval red tail contains 10 LEDs, the round amber side marker contains 4 LEDs, and the license plate light uses a 3‑LED array for clear plate illumination.

• Oval red tail: 10 SMD LEDs each (stop/turn and tail modes).
• Round amber side marker: 4 SMD LEDs each for side visibility.
• License plate: 3 LEDs for focused white illumination.

What are the build, dimensions and weather resistance details?

Housings are heavy‑duty steel with a black powder coat for corrosion resistance and impact protection. Cutouts are factory prepped for the 6" oval, 2" round, and license plate light; rubber grommets seal wires and reduce vibration, so the assembly performs reliably in harsh road conditions.

• Driver box: 8-3/4" x 6" x 3-3/4"; passenger box: 8-3/4" x 4" x 3-3/4".
• Oval lamp w/grommet: 7.3" x 3.1" x 1.8"; round lamp w/grommet: 2.6" x 1.5".
• Powder-coated steel finish and pre-cut mounting holes for quick fitment.

How do I wire and mount the Nilight light box kit?

Wiring follows a simple color-coded scheme: white is ground, black powers tail/marker and license plate lights, and red feeds the stop/turn function. After hardwiring to the trailer harness, attach the box by welding or bolting to your chosen frame location.

• White wire: ground (uses O-ring terminal supplied).
• Black wire: tail side marker and license plate power.
• Red wire: stop/turn light power; hardwire to trailer signal circuit.

Who this is for: this Nilight kit suits boat, RV, utility and cargo trailer owners or fabricators who want an all-in-one, durable rear lighting assembly preloaded with bright SMD LEDs. It's ideal for builders who prefer a welded or bolted steel enclosure that protects lamps from impacts and streamlines wiring and mounting on new builds or retrofits.