Partsam 17-inch Clear-Lens Red LED Tail Light Bar — 40-LED, DOT-Approved Waterproof

Partsam's 17-inch clear-lens red LED tail light bar is a slim, DOT-approved 3-in-1 stop/turn/tail and third-brake identification light built with 40 high-output LEDs and a fully sealed waterproof housing.

This low-profile 17" light bar combines bright NICHIA Super FLUX LEDs with a sonically sealed lens and housing to deliver dependable, visible lighting for trailers, trucks and utility vehicles. It’s designed to mount horizontally, vertically or at an angle where space is limited, and its three-wire hookup supports stop/turn and two brightness tail functions. DOT approval and rugged waterproofing make it suitable for road use and for applications that encounter splashes or temporary submersion, such as boat trailers.

How bright is this 17" LED tail light compared with standard marker lights?

The bar uses 40 high-power NICHIA Super FLUX LEDs producing a combined output around 460 lumens, which is substantially brighter than many incandescent and older LED marker lamps. Brighter illumination improves daytime visibility and makes signals easier to see in challenging conditions without increasing power draw significantly.

• 40 high-power NICHIA Super FLUX LED emitters
• Approximately 460 lumen combined output
• Clear lens with red illumination for strong, consistent signal

What functions does this light bar perform and how is it wired?

This Partsam bar handles three primary functions: stop/turn, tail/marker, and it can serve as a center third brake light or identification marker on wide trailers. Wiring is straightforward with a three-conductor setup that separates ground, high-brightness (stop/turn) and low-brightness (tail) circuits.

• White wire: ground connection
• Red wire: high-brightness (stop/turn/bright mode)
• Gray wire: low-brightness (tail/marker mode)

Is this light bar durable enough for marine or heavy-duty trailer use?

Yes — the housing and lens are sonically sealed into a single unit to prevent water entry and protect the circuit board and LEDs. The sealed construction and DOT approval mean the bar resists moisture, grit and road spray, making it appropriate for boat trailers and heavy-duty service vehicles.

• Sonic-sealed housing and lens to prevent water intrusion
• DOT-approved for road legality and safety compliance
• Low-profile form for protection against snagging and impact

How and where can I mount this thin 17-inch bar?

The slim profile allows flexible mounting: horizontally across trailer rear faces, vertically on towers or sideposts, or at angles to clear obstructions. Its compact size is intended for locations with limited depth where a full-size lamp cannot fit.

• Mounts horizontally, vertically or angled to fit tight spaces
• Ideal as center third-brake or wide-trailer identification marker
• Designed for 12V vehicle electrical systems on trucks and trailers

Who this is for: Professionals and DIY owners who need a compact, dependable rear signaling solution — including boat-trailer owners, cargo and utility fleet managers, pickup and service truck operators, and anyone upgrading incandescent markers for brighter, longer-lasting LED lighting. If you need DOT-compliant visibility in a slim, waterproof package that fits tight spaces, this Partsam 17" LED tail light bar offers a practical, easy-to-install upgrade.