Nilight LED Side Marker Lights 4-Pack 3.9" Amber & Red — Low-Profile, Weatherproof Trailer Clearance

Nilight 4PCS 3.9 Inch amber and red LED side marker lights are compact, weatherproof clearance and marker lamps designed to upgrade visibility on trailers, trucks, RVs and utility vehicles.

These four low-profile LED markers provide crisp amber or red illumination for front, side or rear identification lighting on any 12V vehicle. Built with three high-output piranha LEDs in each housing, the lights are engineered for broad beam spread, reliable sealing and straightforward installation so you can replace brittle incandescent markers or add extra side identification lights quickly.

How bright and durable are these Nilight markers?

Each lamp uses three upgraded piranha LEDs that deliver a stronger, wider beam than older bulb designs while running cooler for better longevity. The optics and LED placement provide consistent light across the lens, improving side visibility without glare.

• 3 piranha LEDs per housing for intensified light output
• wider beam angle for side illumination coverage
• improved heat dissipation for longer LED life

Are these lights weatherproof and rugged enough for roadside use?

The lens and housing are sonically welded into a single sealed unit and the internal LEDs are surface-sealed, so the assembly resists moisture and dust ingress. That construction helps the fixtures stand up to rain, road spray and typical outdoor exposure on trailers and work vehicles.

• sonically welded lens and body for a watertight seal
• surface-sealed LED assembly to prevent internal corrosion
• engineered for everyday road and weather conditions

How simple is the installation and wiring process?

Installation is straightforward: the base mounts with included flat-head screws, and the light snaps into place after wiring. The black wire is ground and the red wire is positive; you can run the lead through a drilled center hole or create a gap with washers to avoid drilling.

• black = ground, red = positive for quick hookup
• mount base with supplied flat-head screws then snap in light
• option to run wires through a drilled center hole or use washers

Which color should I use and where should I place these markers?

Use amber markers at the front and along the sides for lateral visibility, and red markers at the rear for identification and clearance signaling. Their compact 3.9-inch size makes them easy to position on tight or curved surfaces, roof lines, and trailer corners.

• amber for front and side clearance/identification
• red for rear clearance and marker duties
• 3.9" compact size fits narrow mounting spaces

Who is this for: Owners of trucks, trailers, RVs, vans, campers and work vehicles who need a compact, weather-resistant upgrade from incandescent marker lights. These Nilight markers suit DIY installers and professionals who want reliable 12V side and clearance lighting with easy wiring and long-lived LEDs.