Partsam Amber 17-LED Cab Marker Roof Light 5" x 3.74" DOT-Compliant — Super Bright, Low Power

This 5" x 3.74" amber roof marker from Partsam combines a compact footprint with high-output LEDs to modernize cab marker lighting on semi trucks, trailers, buses, and specialty vehicles. It fits many popular heavy-duty models including Kenworth, Peterbilt, Freightliner, Mack, International and other Paccar platforms, and swaps in for older incandescent units to deliver faster illumination, lower current draw, and less heat.

How bright and reliable are the LEDs compared with incandescent cab lights?

The Partsam 17LED array is engineered to be markedly brighter and quicker to light than incandescent bulbs while using less power. LEDs also tolerate vibration and temperature cycles better, extending functional life in heavy-duty applications.

• 17 high-efficiency LEDs for vivid amber output
• Instant-on performance improves visibility during brake or turn events
• Lower amperage draw reduces load on vehicle wiring and battery
• Less wasted heat helps protect housing and wiring over time

Will this assembly fit my truck or trailer without modification?

The Partsam unit is designed as a universal marker compatible with many trucks and trailers but may require minor adjustments on specific models. Check the 5" x 3.74" dimensions and mounting hole pattern before ordering; some applications such as Kenworth W900 could need slight modification for perfect fitment.

• Overall size: 5.00 inches by 3.74 inches
• Pre-drilled screw hole provided (screw not included)
• Fits common mounting locations on cabs, trailers, buses and specialty vehicles
• May require drilling, trimming, or adapter brackets on some models

Is this light DOT compliant and road-legal for commercial vehicles?

Yes — the Partsam 5X amber marker assembly is marked DOT compliant for use as cab and roof marker lighting where amber markers are required. Always confirm local and federal regulations for your vehicle class and install location to ensure full compliance.

• DOT-compliant amber lens and LED configuration
• Intended for heavy-duty truck and trailer marker applications
• Proper wiring and secure mounting recommended for legal use
• Check vehicle-specific rules for marker placement and quantity

How easy is installation and what hardware is needed?

Installation is straightforward on most applications: remove the old assembly, match the hole pattern, and secure the Partsam unit using appropriate screws and sealant. Note that the product ships without mounting screws, so keep suitable fasteners and dielectric grease on hand to protect connections.

• Screw-mount design; screws not included
• Standard 12V wiring harness connections for marker lights
• Use sealant or gasket to prevent moisture intrusion
• Minor trimming or bracket adapters may be required on some cabs

Who is this for: Fleet managers, owner-operators, maintenance technicians and DIY truck owners who want a straightforward, cost-effective LED upgrade for cab and roof marker lights. If you need a durable, DOT-compliant amber marker that reduces power draw, speeds up light response, and modernizes older incandescent fixtures for Kenworth, Peterbilt, Freightliner, Mack, International and similar heavy-duty vehicles, this Partsam 17LED assembly is built to meet those needs while remaining compact and easy to spec into most marker locations.