Nilight 4" Round Trailer Tail Light 2-Pack — 24 SMD White Backup LEDs, IP67 Flush-Mount

Nilight 4" round trailer tail lights are a two-piece set of 24-SMD white LED backup/reverse lamps designed for reliable, bright reverse illumination and tail/parking light functions. These compact, flush-mount lights combine high-output SMD LEDs with a high-transparency lens and IP67 sealed housing to deliver clear visibility in wet or dusty conditions. They’re built to replace or upgrade factory reverse or tail lights on trailers, trucks, RVs, and work vehicles, offering two brightness levels for parking and reversing. Installation requires a 4.57" mounting hole and a 3-prong plug; the lamps operate on 12V DC for wide vehicle compatibility.

How bright are these lights and what makes them effective?

The lights use 24 high-brightness white SMD LEDs per lamp and a transparent lens to maximize light output and spread. Improved heat dissipation keeps the LEDs operating efficiently during extended use, producing consistent illumination for reversing and tail functions.

• 24 SMD LEDs per lamp for strong, even light
• High-transparency lens for improved beam clarity
• Thermally efficient design to reduce lumen drop
• Visible from behind for safer reversing

What mounting and electrical connections are required?

These lights are designed for an easy flush-mount installation: cut a 4.57" diameter hole and 1.89" depth, fit supplied grommets, and set the fixture in place. A 3-prong plug and three-wire lead connect to a standard 12V vehicle circuit so no complicated rewiring is needed for most installations.

• Hole size: 4.57" diameter, 1.89" depth
• Flush-mount with grommet for clean fit and vibration resistance
• 3-prong plug with three-wire lead for standard 12V hookup
• Compatible with trailers, trucks, RVs, and boats (12V systems)

Are these lights weatherproof and durable for outdoor use?

The housing and lens are ultrasonically sealed to an IP67 standard, protecting the LEDs and internal electronics against dust and water immersion up to 1 meter for short durations. Rugged construction and corrosion-resistant materials make them suitable for heavy-duty and marine environments when the plug is secured.

• IP67-rated sealing to resist dust and water ingress
• Ultrasonic bond between lens and housing for long-term durability
• Designed to withstand road vibration and outdoor exposure
• Works reliably in rain, splashes, and mud-prone conditions

How do the two brightness levels work for daily use?

Each lamp offers a low-brightness mode for parking and tail-light visibility and a high-brightness mode for reversing to increase contrast and awareness. The change in intensity lets drivers communicate intent and improves visibility when backing up into dim or obstructed areas.

• Low mode: parking/tail illumination with reduced glare
• High mode: full reverse brightness for better rearward visibility
• Clear change in intensity to alert following traffic
• Simple wiring selects appropriate mode through vehicle circuits

Who is this for? These Nilight 4" round LED lamps are aimed at vehicle owners and fleet managers who need reliable, compact reverse and tail lighting for trailers, trucks, horse trailers, RVs, and boats. If you want an easy-to-install, weatherproof upgrade with clear two-stage brightness and strong LED output for safer reversing and parking, this pair is a practical, maintenance-light choice.

FAQ

Q: What size hole do I need to mount these lights?

A: Cut a 4.57" diameter hole with 1.89" depth; use the supplied grommet for a flush fit.

Q: Are these lights waterproof for marine use?

A: Yes. They are IP67 sealed and resist dust and temporary water immersion when the plug is tightly secured.