Nilight Trailer Light Box Kit — Steel housing with pre-mounted LED oval tail, round marker & license lamp, black powder-coat

The Nilight Steel Trailer Light Boxes Kit is a ready-to-install steel housing that secures oval tail lights, round side markers and a 3‑LED license plate lamp to trailer frames for stop/turn/tail and reverse lighting.

This all-in-one kit supplies a powder-coated steel light box pre-cut for common lamp sizes, plus factory-mounted LED lights and pigtail wiring so you can weld or bolt the assembly to your trailer quickly. Designed to replace exposed lamps or to protect lights on new builds, the unit uses bright SMD LEDs for clear red tail/stop illumination, lower-intensity tail/marker output and white reverse/license plate lighting. The steel housing and durable finish provide corrosion resistance and protection from road debris and weather when mounted to the rear, side, bottom or top frame of a utility, cargo or equipment trailer.

How do I install the Nilight light box on my trailer?

Installation is straightforward for anyone familiar with trailer wiring and basic metalwork. The lights come pre-mounted in the box; you hardwire each pigtail to the corresponding trailer circuit, then either weld or bolt the box to your trailer frame at the chosen location.

• Pre-cut openings for 6" oval tail lamp, 2" round marker lamp and license plate lamp.
• Wiring color guide: oval light black = ground, brown = tail, red = stop/turn, white = reverse/license plate ground where applicable.
• Mount by welding or bolting to rear, side, bottom, or top trailer frame members.
• Includes simple removal tips for lamp servicing or replacement.

What kind of lighting performance can I expect?

Nilight outfits the kit with SMD LED lamps that deliver distinct light levels for each function: high-intensity red for brake and turn signals, lower-intensity red for tail/marker use, and bright white for backing or license plate illumination. LEDs provide instant-on response and long operating life compared with incandescent bulbs.

• High-bright red for stop/turn visibility in traffic situations.
• Lower-bright tail/marker output to meet running-light needs without glare.
• White reverse and license plate light with 3-LED design for clear illumination.
• LEDs reduce power draw and maintenance frequency.

Is the light box durable enough for road and weather exposure?

The assembly is built from heavy-duty steel and finished with a black powder coating to resist rust and chips from stones and salt. Pre-cut holes and a snug fit around each lamp help keep water and grime out, and the steel shell provides physical protection from impacts and abrasion.

• Heavy gauge steel construction for impact and load resilience.
• Black powder-coat finish for corrosion resistance and long-term appearance.
• Pre-cut, well-fitted lamp openings to reduce water intrusion.
• Designed to perform across harsh weather and road conditions.

Who is this kit for? The Nilight Steel Trailer Light Boxes Kit is intended for trailer builders, repair shops and DIY owners who want a protected, factory-mounted light solution. It fits trailers that need a compact, durable housing for 6" oval tail lamps, 2" round side markers and a dedicated license plate lamp—ideal when replacing vulnerable exposed lights, upgrading to LED, or finishing a custom trailer frame.