Partsam 4" Round Red LED Trailer Tail Lights — 4-Pack, 24-LED Flange Mount, Dual-Brightness, IP65

If you need compact, durable lighting for a trailer, RV or work truck, this four-pack of 4-inch round LEDs delivers multi-function signaling in a low-profile housing. Each lamp contains 24 high-intensity red LEDs arranged to maximize visibility while using minimal power. The built-in flange makes surface installation straightforward, and the IP65 rating helps keep the lights working through rain, mud and road spray. These lights are designed for standard 12V systems and come wired for direct, reliable connections.

How do these lights perform as stop, turn and tail signals?

Each lamp uses a multi-function circuit so the same lens handles stopping, turning and running tasks. Bright LEDs provide clear signaling to other drivers, while a secondary lower-brightness mode preserves visibility for tail/running functions. The arrangement and quantity of LEDs improve beam uniformity compared with a single bulb.

• 24 super-bright red LEDs per housing for high visibility
• Dual-brightness functionality: higher for stop/turn, lower for tail
• Consistent light pattern that reduces dark spots at distance
• Suitable for standard signaling wiring on trailers and trucks

What is involved in installing the flange-mount lights?

The lights are flange-mounted for surface installation and require a single mounting hole in the vehicle body. The flange simplifies alignment and secures the light without needing an inset pocket. Installation uses a 3-wire hardwired setup: ground, stop/turn, and tail power, making it compatible with common trailer wiring harnesses.

• Built-in flange for simple surface mounting; no recessed cavity needed
• Approximate mounting hole size: 4.38 inches diameter
• 3-wire hook-up: gray ground, red for high-brightness stop/turn, green for low-brightness tail
• Easy replacement for existing 4" round trailer lights

Are these lights weatherproof and durable enough for heavy use?

The housings meet an IP65 ingress protection rating, so they resist rain, dust and road spray commonly encountered in towing and outdoor work. The sealed lens and gasketed flange help prevent moisture intrusion, while LEDs provide long operational life with shock resistance compared to filament bulbs. The compact round design also minimizes exposure to impact from debris.

• IP65-rated sealing against water jets and dust
• Sealed lens and flange gasket for dependable weather resistance
• LEDs tolerate vibration and shock better than incandescent bulbs
• Low-power operation reduces electrical load on 12V systems

Will these fit my vehicle’s electrical system and bodywork?

They are engineered for standard 12V DC vehicle electrical systems, making them compatible with most trailers, RVs, trucks, semis and utility vehicles. Confirm the mounting hole and wiring colors on your trailer before ordering; the set is ideal for retrofit or new installations where a 4-inch round housing is required. Wiring follows common trailer conventions to streamline hookup.

• Designed for universal 12V DC systems on trailers and light trucks
• Common wiring color code: gray = ground, red = stop/turn, green = tail
• Mounting fits vehicles needing a roughly 4.38" hole and flange surface
• Includes four matching lights for axle-spanning installations

Who is this for: This 4-piece Partsam LED set is aimed at DIYers, fleet operators and trailer owners who want a compact, weather-resistant lighting solution that combines stop, turn and tail functions. It suits anyone updating older incandescent fixtures, fitting new trailers or maintaining RV and truck signaling equipment and who needs reliable 12V performance with straightforward flange mounting.