Ronybuy 4-inch Round LED Trailer Tail Lights 10-Pack Red — 24-LED Sealed Flush-Mount, Waterproof

Ronybuy's 4-inch round LED trailer tail lights are a 10-piece sealed flush-mount kit with 24 LEDs each, providing stop, turn and tail light functions in a weatherproof plug-and-play package.

These compact red round lights are built for trailers, trucks, RVs and other 12V vehicles that need bright, reliable rear signaling. Each lamp contains 24 LED chips for improved brightness and heat dispersion, and the kit includes rubber grommets plus 3-prong wire plugs so you can install them without sourcing extra parts. The housings are water-tight with an IP65-style sealed design (not for submerged use), making them suitable for road exposure and most wet conditions.

How bright and versatile are these 4" LED tail lights?

Each light uses 24 LEDs arranged to deliver two distinct intensity levels: a higher-output mode for stop/turn/brake signals and a lower-output mode for running/tail illumination. That split lets one lamp perform multiple signaling roles while maintaining clear visibility for following drivers.

• 24 LED chips per lamp for stronger illumination and better heat dispersion
• Dual brightness: high for stop/turn/brake, low for tail/running light
• Sealed lens ensures consistent light output in rain and road spray

What exactly comes in the package and how simple is installation?

The kit is delivered complete: ten 4" round red LED lights, ten rubber grommets sized for a 4.1" inner light diameter, and ten molded 3-prong pigtail plugs. Wiring follows a straightforward color code so you can connect to standard 12V trailer circuits without splicing extra components.

• 10 lights, 10 grommets and 10 three-prong wire plugs included
• Wiring guide: white = ground; red+white = high brightness; black+white = low brightness
• Outer grommet diameter ~5.3", light inner diameter ~4.1", thickness ~1"

Are these tail lights weatherproof and durable for road use?

Ronybuy lights feature a water-tight sealed design and premium rubber grommet to resist moisture and dust in everyday road conditions. They are engineered for long service life under wet and dirty environments, but they are not intended for continuous underwater exposure or corrosive saltwater immersion.

• Sealed housing with IP65-like protection against rain and road spray
• Rubber grommets provide vibration damping and a tight deck seal
• Molded 3-prong plugs for reliable electrical contact and easier replacement

Will these fit my trailer or truck—what should I measure?

The lights are designed to work with virtually any 12V DC system, but fit depends on your cutout and mounting method. Measure the mounting hole and panel thickness before installation to confirm compatibility with the supplied grommets and 1" lamp thickness.

• Compatible with 12V vehicles: trailers, RVs, trucks, tractors, horse trailers
• Check for ~4.1" inner light diameter and ~5.3" grommet outer diameter
• 1" lamp thickness—ensure flush-mount depth is adequate

Who is this for: This 10-piece Ronybuy kit suits fleet owners, trailer builders, RV enthusiasts and DIY vehicle owners who need multiple reliable, sealed LED rear lamps at once. It’s especially useful when replacing worn incandescent lights across several vehicles or upgrading older lighting to low-power, high-visibility LED units. If you have standard 12V wiring and can measure your mounting holes, this set delivers an economical, ready-to-install solution with complete grommets and plugs.