Partsam 15.5" LED Trailer Light Bar — 3-ID Red Marker + Reverse White LEDs, Submersible Slim

Partsam's 15" dual-function LED light bar combines the DOT-required 3-ID red marker lights with eight bright white reverse LEDs in a slim, submersible housing. This low-profile light bar is built for trailers, trucks, RVs and utility vehicles that need a compact, waterproof marker and reverse light solution. The unit measures 15.5" long with a clear lens and hardwired three-conductor input so you can operate red marker illumination and white reverse lights independently. Its narrow width and shallow depth make it ideal where space is limited or mounting surfaces are unconventional.

How does this light bar meet vehicle visibility requirements?

The Partsam 3-ID bar satisfies DOT-style marker requirements by providing three distinct red identification lamps across a 15" assembly, while offering broad-angle illumination for visibility at distance. The clear lens and strong LED output give a bright, consistent signature that helps other drivers recognize wide vehicles at night or in poor weather.

• Three red ID LEDs spaced across the bar for DOT-style marking.
• Wide beam angle for increased side and rear detection.
• Clear lens maximizes light transmission and visibility.
• Meets typical FMVSS-style brightness expectations for marker lamps.

Can it act as a reverse or work light as well?

Yes — the same assembly contains eight bright white LEDs that function independently as reverse, loading, or utility lights. A separate wire lets you switch the white LEDs on without powering the red marker lights, so you get task lighting for hooking up or backing without sacrificing marker compliance.

• Eight white LEDs provide focused back-up and area lighting.
• Independent wiring (ground + red or black) for separate modes.
• Useful for hookup, loading, and short-range illumination tasks.
• Low heat, energy-efficient LED operation for long life.

What are the installation and durability details I should know?

The slim lamp is built to be submersible and hardwired with three wires: one ground and two positive feeds for red and white modes. It measures 15.5" x 1.3" x 0.47" with 14.5" hole center spacing; surface mounting requires a ~0.57" circular cut-out and screws (not included).

• Dimensions: 15.5" long; 14.5" hole centers; 0.47" thickness.
• Hardwired three-conductor cable: ground, red (ID), black (white LEDs).
• IP-rated submersible construction for wet and marine environments.
• Can be mounted horizontally, vertically or at an angle for flexible placement.

Which vehicles and situations are best for this light bar?

This Partsam lamp is purpose-built for heavy-duty, commercial, and recreational applications where width marking and auxiliary reverse lighting are needed together. It suits semi-trailers, cargo trailers, RVs, utility trailers, work trucks, tractors and other wide or space-constrained vehicles.

• Semi-trailers, flatbeds and cargo trailers requiring ID marker lights.
• RV and camper installations that need backup illumination while meeting marker rules.
• Boat trailers and marine use thanks to submersible sealing.
• Work trucks and specialty vehicles with limited mounting depth.

Who is this for This Partsam 15" dual-function LED bar is for fleet managers, trailer owners, RV enthusiasts and DIY mechanics who want a compact, DOT-style identification marker that also provides usable white reverse or task lighting. If you need a narrow, durable lamp that installs in tight spaces, resists water and delivers both compliance and practical illumination, this model balances visible marker performance with versatile utility lighting.

FAQ

Q: Does this bar provide both red marker and white reverse light?

A: Yes. It has separate wiring to power three red ID lights and eight white LEDs independently.

Q: Is the unit waterproof for trailer and marine use?

A: Yes. The light bar is submersible and sealed for wet environments such as boat trailers.