Nilight Steel Weld-On Trailer Light Box Kit with 6" Oval LED Tail Light — Black Powder-Coated, Weld-Ready Steel

Nilight's Steel Weld-On Trailer Light Box Kit is a complete, heavy-duty mounting solution that includes a 6" oval LED tail light and welded-ready housing for stop, turn and tail functions.

This kit pairs a robust powder-coated steel box with an energy-efficient 6-inch oval SMD LED tail light to supply weather-resistant rear lighting and a neat, factory-style mount for trailers. Designed for weld or bolt installation, the assembly replaces flimsy plastic housings and centralizes stop/turn/tail and side-marker functions into a single steel unit that fits rear, side, bottom or top frame positions.

How does the kit simplify trailer light mounting?

The weld-on box is pre-cut to accept a 6" oval tail light, a 2" round side light and a license plate, so you won’t need to fabricate custom openings. It installs directly onto tubing or plate frames via welding or bolting, which speeds up fitting and produces a tidy, secure finish.

• Pre-cut openings for 6" oval tail and 2" round side marker
• Weld-ready steel box fits rear, side, bottom or top frame
• License plate mounting provision included
• Option to bolt on if welding isn’t preferred

What makes the light and housing durable outdoors?

The housing is formed from heavy-gauge steel and finished with a black powder coat to resist corrosion and chipping. The LED light uses SMD diodes known for long life and consistent output, maintaining visibility in wet, dusty or rough conditions without frequent bulb changes.

• Heavy-duty steel construction for impact resistance
• Black powder-coat finish for rust and weather protection
• SMD LED array for long service life and low heat
• Sealed lens design improves water and debris resistance

How do the wiring and lighting modes work for safety and compatibility?

The included 6" oval LED provides bright red output for stop/turn signals and a lower-intensity mode for tail and side marker functions, matching standard trailer wiring schemes. Color-coded wires simplify hookup: white is ground (with an O-ring terminal), black runs the tail/marker circuit, and red handles the stop/turn circuit.

• Red wire: stop and turn signal input
• Black wire: tail and side-marker circuit
• White wire with O-ring terminal: dedicated ground
• Standard 3-wire layout fits most trailer harnesses

Will this kit fit my trailer and lighting needs?

The box is sized and laid out to accommodate common trailer frames and 6" oval LEDs used on many utility, cargo and boat trailers. Because it can be welded or bolted in multiple orientations (rear, side, bottom, top), it adapts to different mounting locations and retrofit projects without major modification.

• Universal fit for trailers using 6" oval tail lights
• Multiple mounting orientations for flexible placement
• Works for new builds and upgrades to existing trailers
• Compact footprint keeps lights protected and out of the way

Who is this for: This Nilight Weld-On Trailer Light Box Kit is aimed at DIYers, fabricators and professional trailer builders who want a stronger, more weatherproof rear lighting solution. It benefits owners of utility, cargo, landscape, boat and equipment trailers who need a tidy, durable mounting solution with clear wiring and bright LED performance for improved nighttime visibility and longevity.