Nilight Steel Trailer Light Box Kit – Black Powder-Coat, Oval Tail + Round Marker & Plate LEDs

Nilight's steel trailer light box kit is a ready-to-install assembly that secures LED oval tail lights, round side marker lamps and a license-plate light to trailers, delivering weather-resistant stop, turn, tail and reverse illumination.

This kit combines heavy-gauge steel housings with molded LED lamps so you get a tidy, protected lighting cluster for new builds or retrofits. It arrives with pre-punched mounting holes, the lamps already seated in the steel boxes and pigtail wiring for direct hookup to your trailer harness — designed to simplify fitting on rear, side, top or bottom frame locations.

How durable is the Nilight light box and will it resist road conditions?

The structural boxes are formed from thick steel and finished with a black powder-coat to limit corrosion and chips. LED fixtures are sealed in place and the kit tolerates mud, rain and typical road debris better than exposed lamps.

• Heavy-duty steel construction for impact resistance
• Powder-coated surface resists rust and abrasion
• Sealed lamp mounting reduces water ingress

What lighting functions are included and how bright are they?

The set uses SMD LEDs to provide distinct intensity levels for different functions: high-output red for braking, dimmer red for tail/marker use, and white for reversing and the license plate. The 3-LED plate lamp boosts visibility behind the trailer at night.

• High-bright red for stop/turn signals
• Low-bright red for tail and side marker lighting
• White LED for reverse and three-LED plate illumination

How hard is installation and what wiring should I expect?

The lights are pre-mounted in the boxes so installing typically involves fastening the boxes to your trailer and connecting the pigtails to your trailer wiring. The kit supports both welding and bolting; color-coded wires identify ground and function to simplify hookup.

• Pre-cut holes to accept 6" oval, 2" round, and plate lamp fittings
• Oval light wiring: black ground, brown low, red high, white reverse
• Marker and plate: white ground, black positive; hardwire each pigtail accordingly

How do I remove or service the lamps if maintenance is needed?

Service is straightforward: the oval lamp can be pressed out for access, and round markers are pushed from the inside to dislodge them. Keep the silicone seals and inspect them during reassembly to preserve the kit's weather protection.

• Press down on the oval lens and it will release
• Remove silicone seal before extracting lamps
• Push round lamps out from inside the box for easy replacement

Who is this for: The Nilight steel trailer light box kit suits builders, DIY trailer owners and repair shops that need a rugged, compact lighting solution for flatbeds, utility trailers, campers and work trailers. If you want an integrated lamp cluster that protects LEDs from impact and weather while giving clear stop/turn/tail and reverse lighting, this kit provides a practical, installer-friendly option without requiring custom fabrication.