Partsam 4" Rectangular LED Side Marker Lights — 4-Pack (2 Red/2 Amber), DOT-Certified Waterproof, Low-Profile

Partsam 4-inch rectangular LED side marker lights are DOT-certified front/rear/side clearance lamps that provide bright, low-profile identification and marker lighting for 12V trucks, trailers, RVs and campers.

These compact rectangular LED marker lights come in a set of four (two red and two amber) and are engineered for rugged vehicle use. Each lamp contains six high-output LEDs inside a sealed, snap-on lens and housing unit, delivering reliable illumination for side marker, clearance, or identification needs. The units are DOT approved and designed to hardwire directly to 12V systems using the included two-wire setup and mounting screws.

How do these marker lights install and connect?

Installation is straightforward: the lights are hardwired with two center-exiting wires—red for positive and black for ground—and include screws for fast mounting. The two-wire design allows surface mounting on most vehicles without a separate socket. You simply route the wires, secure the light to the vehicle body, and connect to your 12V circuit.

• Hardwired with center exit wires: red positive, black ground
• Includes mounting screws for quick attachment
• Compact 4" x 2" x 1" footprint fits standard marker locations
• Hole spacing 75mm (3") matches common mounting patterns

What makes these lights durable for outdoor and marine use?

Each Partsam lamp is sonically sealed so the lens and housing form a single waterproof unit, keeping moisture and dust out of the LEDs and wiring. The snap-on, replaceable lens is built to withstand vibration and weather exposure typical of highway and marine environments.

• Sonic-sealed housing for waterproof protection
• Durable lens that snaps on and is replaceable if damaged
• Sturdy construction resists road vibration and salt spray
• DOT-certified for compliant, long-term use

How bright and visible are these markers for safety and compliance?

Each rectangular unit contains six LEDs designed to produce a clear, consistent output suitable for side marker and clearance applications. The red and amber color options match standard vehicle lighting requirements, improving visibility at night and in poor weather without excessive power draw.

• Six LEDs per lamp for even illumination
• Available in red and amber to meet marker and clearance color needs
• Low current draw for efficient 12V operation
• DOT approval supports regulatory compliance

Will these fit my vehicle—what are the dimensions and fit points?

The lights measure 101mm x 49mm x 23mm (4" x 2" x 1") with mounting hole spacing of 75mm (3"), fitting many common marker locations on trucks, trailers, RVs and other 12V vehicles. Their slim profile makes them suitable for tight mounting spaces while still offering clear visibility.

• Overall size 101mm x 49mm x 23mm (4" x 2" x 1")
• Hole distance 75mm (3") for compatibility with existing mounts
• Thin housing for flush or surface mount positions
• Ideal for pickups, trailers, RVs, campers, boats, buses and vans

Who is this for: These Partsam 4" rectangular LED side marker clearance lights are intended for vehicle owners and fleet operators who need reliable, DOT-approved marker lighting. They suit DIY installers, mechanics, and anyone upgrading or replacing exterior marker or clearance lamps on 12V trucks, trailers, RVs, campers, buses, and boats. If you want durable, waterproof markers with simple hardwired installation and clear red or amber visibility, this four-piece set meets those needs without complex wiring or bulky housings.