Nilight 16in LED Trailer Marker Light Bar, Red — 2-Pack, Weatherproof Multi-Function

The Nilight 16" LED Trailer ID Marker Light Bar is a weatherproof, multi-function red LED light strip sold as a 2-pack for 12V trailers and heavy-duty vehicles.

These slim, 16-inch red marker bars by Nilight combine stop, tail, parking and turn signal functions into a single sealed assembly. Built with 11 high-output LEDs per unit and a polycarbonate lens welded to the housing, the lights are designed for exterior vehicle use where visibility, durability, and simple installation matter. Each set includes two light bars and mounting hardware to outfit trailers, RVs, trucks, and other towable equipment.

How does this light bar handle different lighting functions?

Each Nilight bar integrates three brightness levels and multiple uses in one fixture, so you can wire it to behave as a tail light, brake light, turn signal, or parking light. The wiring harness differentiates ground, low-brightness, and high-brightness outputs for flexible configuration.

• 11 LEDs per bar deliver both high- and low-brightness modes;
• White wire = ground; black = low brightness/tail; red = high brightness/brake;
• Combines tail, stop, parking, and turn signal roles into one unit;
• Works with standard 12V vehicle electrical systems.

Why is this Nilight bar suitable for outdoor and marine conditions?

Nilight emphasizes sealing and rugged construction: the polycarbonate lens is sonically welded to the body and the back wire lead is sealed with adhesive to keep water out. That makes the light bars able to withstand rain, splashes, and road grime without easy failure.

• Sonically welded polycarbonate lens resists impact and UV exposure;
• Back wire lead glued and sealed to prevent water ingress;
• Durable housing built for frequent outdoor use and towing work;
• Designed to resist corrosion on boats, trailers, and work vehicles.

How do I mount and wire these 16" marker lights?

Mounting can be flush or bracket-assisted depending on whether you want to drill through the fixture. The package includes screws and two hardware packs; optional washers or brackets let you avoid drilling through the back wire lead for a non-invasive install.

• Flush-mount: feed wires through center hole and secure ends with supplied screws;
• No-drill option: use washers or mounting brackets to secure without cutting the housing;
• Simple three-wire connection matches standard trailer wiring conventions;
• Hardware packed for immediate install on trucks, trailers, and RVs.

What vehicles and uses are these lights designed for?

The Nilight 16" LED marker bars suit a broad range of 12V applications where a long, low-profile red marker or ID light is required. They’re commonly installed on trailers, semi-trucks, RVs, and boats for improved side and rear visibility during towing and parking.

• Compatible with most 12V systems: heavy-duty trucks, semi trailers, cargo trailers;
• Also fits boat trailers, travel trailers, horse trailers, and campers;
• Ideal for replacing worn marker bars or upgrading incandescent fixtures to LEDs;
• Sold as a convenient 2-pack with mounting hardware included.

Who is this for? The Nilight 16" LED Trailer ID Marker Light Bar is aimed at vehicle owners, fleet managers, and DIY mechanics who need a low-profile, reliable red marker light that combines multiple functions and stands up to outdoor use. Choose these bars if you want an upgrade from incandescent marker lights, need watertight construction for marine or roadside conditions, or want a simple, adaptable mounting and wiring solution for trailers, trucks, or RVs.