Nilight Steel Trailer Light Box Kit Black with Oval Taillight & Round Marker, Pre-mounted LEDs

Nilight's steel trailer light box kit is a ready-to-install housing that secures oval stop/turn/tail lights, round side markers, and a 3-LED license plate lamp for improved visibility on trailers.

This all-in-one assembly combines a heavy-duty black powder-coated steel box with pre-mounted LED lamps and pre-cut mounting holes, letting you fasten or weld a complete rear lighting cluster to new or existing trailer frames. It's built for corrosion resistance and clear signaling—suitable where a low-profile, protected light installation is needed.

How does this kit protect lights and wiring on a trailer?

The steel enclosure shields lenses and connections from road debris, moisture, and accidental impacts. Its powder-coated finish adds rust resistance, and pre-cut apertures help keep lamps snug and aligned for reliable illumination.

• Heavy-gauge steel housing resists dents and deformation.
• Black powder coat prevents corrosion in wet environments.
• Pre-cut openings sized for 6" oval and 2" round lamps ensure a tight fit.
• Integrated box reduces exposed wiring and dangling fixtures.

What lighting functions and brightness should I expect?

The kit mounts SMD LEDs that deliver bright red output for stop/turn signals and a dimmer output for tail/marker operation. A separate 3-LED license plate lamp offers clear illumination for plate visibility at night.

• SMD LED technology for efficient, high-visibility lighting.
• Distinct stop/turn (bright) and tail/marker (lower) output levels.
• Dedicated 3-LED license plate light included for compliance and safety.
• Color and intensity tuned for quick recognition by other drivers.

How easy is installation and wiring?

The lights arrive mounted in the box so installation mainly requires securing the box to the trailer and connecting the pigtail wires to your trailer harness. You can weld or bolt the box to rear, side, top, or bottom frame positions depending on your setup.

• Pre-mounted lights reduce assembly time and alignment work.
• Wires labeled by color: white for ground, black for tail/marker and plate, red for stop/turn.
• Options to bolt or weld for permanent attachment.
• Suitable for new builds and retrofits on existing trailers.

Will this hold up in bad weather and rough use?

Yes — the combination of a robust steel shell, powder-coated finish, and sealed LEDs is designed to withstand rain, road spray, and general outdoor exposure. While the lights are durable, regular inspection of seals and wiring is recommended for long-term performance.

• Powder-coating guards against rust and flaking paint.
• LEDs are less heat-prone and longer-lived than incandescent bulbs.
• Steel box provides mechanical protection from impacts and stones.
• Pre-cut holes reduce chances of misfit gaps that admit moisture.

Who is this for: The Nilight steel trailer light boxes kit is aimed at trailer builders, fleet maintainers, and DIY owners who want a compact, protected lighting cluster that’s easy to attach. Choose this set if you need a weather-resistant mounting solution that consolidates tail, stop, marker, and license lights into one durable package for commercial trailers, utility trailers, boat trailers, or any vehicle needing clear rear illumination.