Partsam Trailer Light Box Kit with 6" Oval LED Tail Lights & 2" Round Marker Lights — Black Powder-Coated Steel, IP65

Partsam's welded steel trailer light boxes kit is a complete, rust-resistant mounting solution that holds 6" oval LED tail lights and 2" round LED marker lights for a secure, weatherproof lighting installation.

This kit combines heavy-gauge carbon steel housings, pre-welded left and right mounting boxes, and high-output LED lamps so you can add or replace rear lighting on utility trailers, boat trailers, semis, and flatbeds without relying on fragile plastic fixtures. The housings are powder-coated for corrosion resistance, the lamps are IP65-rated for wet conditions, and the wiring uses color-coded pigtails for straightforward hardwiring to a 12V trailer harness.

How durable are the steel light boxes in outdoor conditions?

The housings are built from thick carbon steel finished in a black powder coat that resists chipping, rust, and UV degradation better than common plastic mounts. Because the boxes are welded, they provide a permanent attachment point that holds up to road vibration and weather exposure.

• Heavy-gauge carbon steel construction for structural strength
• Black powder coating to slow corrosion and maintain appearance
• Welded left/right boxes for a secure, long-lasting mount
• IP65-rated LEDs to withstand rain and splashes

What lights and wiring come with the kit, and how do they connect?

The package includes two 6" oval red/white LED tail lights and two 2" round red LED marker lights, plus rubber grommets and color-coded pigtail connectors for easy hardwiring. Each lamp has a simple wiring scheme so you can match colors to your trailer harness without extra adapters.

• 2x 6" oval 23-LED tail lights (red/white functions)
• 2x 2" round red 4-LED marker lights with grommets
• Color-coded wires: black=ground, red=brake, white=tail, yellow=reverse
• Included 2-wire and 3-wire pigtails for direct connection

How straightforward is the installation of these boxes on my trailer?

Installation is designed for a welded application: mount and weld the left and right boxes to the trailer frame, press the lights into the rubber grommets, then hardwire each pigtail to the corresponding circuit. The kit eliminates the need for additional plastic housings or complex harness assemblies.

• Weld boxes to rear, side, bottom, or top frame surfaces
• Push lights into grommets for a sealed fit
• Hardwire pigtails to existing 12V trailer wiring—no extra harness
• IP65-rated lamps minimize leak points when grommets are seated

Which vehicles and use cases are these light boxes best suited for?

This kit works with most 12V trailer systems and is tailored for owners who want a rugged, permanent lighting solution. It’s appropriate for commercial and recreational trailers, including boat trailers, flatbeds, utility trailers, and semi-trailers that need improved durability over plastic mounts.

• 12V boat trailers and utility trailers exposed to water and salt
• Flatbeds and commercial trailers requiring heavy-duty mounts
• Retrofit projects replacing worn or broken plastic housings
• Owners wanting a welded, tamper-resistant light attachment

Who is this for: The Partsam welded light boxes kit is aimed at trailer owners, fleet managers, and DIY fabricators who need a sturdy, weatherproof rear lighting solution. If you want long-lasting steel mounts, clear LED illumination, and uncomplicated hardwiring for a 12V trailer system, this kit provides the lamps, grommets, and pigtails necessary for a professional-feeling installation without relying on fragile plastic parts.