Whether you’re upgrading a trailer, RV, or utility vehicle, these four-inch round LED tail lights with reverse function provide brighter, more reliable signaling and backup illumination. This guide highlights five top options, explaining who they’re best for and why each stands out. Use the quick comparison table below to decide which set fits your wiring, mounting needs, and weather conditions.
| Product | Best For | Why It Stands Out |
|---|---|---|
| Nilight Trailer Tail Lights 2PCS 4 Inch | Budget upgrades with dual-color LEDs | Bright 16 LED per light, IP67 waterproof, three-function lighting |
| Partswcgg 4Pcs 4″ Round Dual Red/White | Batch installs and complete kit | 24 LED chips per light, rubber grommets, 3-prong pigtails |
| PVerandio Pack of 4 4 Inch LED Round Lights | Mid-range, multipurpose | Dual-color with clear housing, standard wiring |
| Partsam 2Pcs 4 Inch Red/White Kit | Compact pairing for smaller trailers | 19 diodes, rubber grommets, easy wiring |
| Nilight 2PCS 4 Inch White Backup Lights | Bright backup illumination | 12 Piranha LEDs per light, wide angle, surface mount |
Nilight Trailer Tail Lights 2PCS 4 Inch Brake Reverse LED Lamp
This pair provides a compact, budget-friendly upgrade with multi-function lighting. Each light combines a 10 LED red outer ring for tail and brake signals with a white inner 6 LED circle for reverse/backup. The design uses 16 quality LEDs per light for high visibility. The polycarbonate lens concentrates light for safer operation at night. Best for: budget-conscious buyers who want clear, bright signaling and a simple install for small trailers or utility vehicles. Caution: ensure proper sealing to maintain IP67 waterproof performance in heavy exposure.
Why this pick: The dual-function red and white LEDs give you tail/brake and reverse lighting in a single unit, which reduces wiring complexity. The weatherproof housing and sealed outlet minimize moisture intrusion. It’s well suited for standard 4-inch grommets and offers straightforward mounting for DIY installations.
Installation notes: surface mount with rubber edge seal; three-prong plug compatibility is typical, but verify your trailer’s wiring colors align with red (high), black (low), and white (ground) conventions. Consider a back-up light upgrade if you need more reverse illumination in dark conditions.
Partswcgg 4Pcs 4 Inch Round Dual Red/White Lights
This 4-pack pairs four 4-inch round LED tail lights with red stop/turn/tail lighting and white back-up lighting. Each light contains 24 LED chips for bright output while drawing low current. They come with rubber grommets and a 3-prong wire pigtail for easy installation. Best for: larger trailer fleets or multi-axle trailers requiring multiple matching lights and a quick, flush-mount setup. Choosing this set reduces the need for separate backing lights. Caution: IP65 rating indicates waterproof but not submersion; avoid underwater use.
What stands out: the dual-color capability uses the same LEDs to deliver red and white outputs with a dedicated auxiliary wire for backup function. The included grommets and pigtails simplify installation on standard 4-inch openings. The white light is wired as the backup function, enabling a straightforward reverse signal.
Limitations: ensure a proper sealed seal around each grommet to preserve long-term water resistance; over-tightening can distort grommets and compromise sealing. Verify your vehicle’s 12V system and wiring colors before wiring.
Partswcgg 4Pcs 4″ Red/White Dual Trailer Lights
Featuring four 4-inch round dual-output lights with 19 LEDs per unit, these are designed to switch cleanly between red stop/turn/tail and white backup signals. The design includes a rubber gasket, three-prong pigtails, and a layout that can be mounted flush with standard 4.5-inch hole references. Best for: users who want a durable, IP67-rated housing with dual-functionality and a compact footprint for tight trailer spaces. Caution: the extra wiring adds complexity; follow the color guide for ground, tail, and positive connections to avoid miswiring.
Why select: the white backup light can override red signals during reverse, ensuring drivers behind you see a dedicated reverse output. The 5.1-inch diameter grommet fit and 1.1-inch height are typical for 4-inch installations, making this compatible with many trailer openings.
Considerations: verify availability of a suitable three-prong connector on your trailer harness; ensure your wiring harness can accommodate the additional auxiliary wire used for backup lights.
PVerandio Pack of 4 4 Inch LED Round Trailer Brak/Reverse Lights
This four-pack offers dual-color LEDs with 24 diodes per light and a clear housing. Red functions cover stop/turn/tail signals, while white provides backup lighting. It uses standard three-prong wiring with rubber grommets for a flush mount. Best for: mid-range installations where a clean, clear signal is important and you want a consistent look across multiple lights. Caution: IP-rated for outdoor use, but avoid emersion in water to maintain seal integrity.
Why it’s a good fit: dual-color capability plus an easy wiring configuration makes it a versatile choice for different trailer types. The kit includes rubber grommets for a snug, weather-resistant seal and standard three-prong pigtails for straightforward electrical hookup.
Limitations: drill hole size and mounting depth must match the grommet dimensions; verify your trailer’s opening size before purchasing a full set.
Partsam 4Pcs 4″ Inch Round Led Stop Turn Tail Back-up Reverse Lights
This 4-pack includes two red stop/turn/tail lights and two white backup lights. Each light uses 19 LEDs for bright output and includes rubber grommets and 3-prong pigtails for quick installation. Best for: replacements on mid-sized trailers or RVs where a balanced red/white light kit is desired. Caution: IP65 rating indicates water resistance but not submersion; avoid submerging the lights in water.
Key benefits: dual-color LEDs allow same units to provide stop/turn signals and reverse lighting. The general dimensions (about 5.3-inch outer diameter, 1.2-inch height) fit typical 4-inch openings and align with common mounting grommets.
Limitations: ensure the white wire is correctly grounded, and keep the wiring harness clear of sharp edges that could abrade insulation over time.
Partswcgg 4″ Inch Round LED Trailer Tail Lights 24 LED
This set includes 12 lights total (8 red and 4 white), with 24 LEDs per light for strong visibility. The housing is IP67 waterproof and submersible, and the lights are flush-mounted with rubber grommets and standard 3-prong pigtails. Best for: higher-quantity installations on larger trailers or commercial setups needing consistent, high-visibility signaling. Caution: ensure you have adequate space for the grommet and wire routing in tighter installations.
What makes it useful: high LED density improves brightness and reliability in tough weather conditions. The IP67 rating supports use in rain, mud, and road spray. The red lights handle stop/turn/brake duties while white provides backup signals when needed.
Note: verify your trailer’s wiring conventions; the white is typically the ground, red for live signals, and black for tail running or auxiliary use depending on the model.
Buying Guide: Key Considerations For 4-Inch LED Tail Lights With Reverse
- Wiring and color conventions: Most kits use white for ground, red for stop/turn, and black or yellow for tail or reverse, depending on the model. Confirm wiring color codes before installation to avoid miscommunication between signals.
- Waterproof rating: IP65/67 indicates moisture resistance. IP67 provides submersion protection; IP65 is splash resistant. Choose based on exposure level (open trailer, boat trailer, or RV).
- LED count and brightness: More LEDs generally yield higher brightness and longer life. Consider the lighting angle and reflectivity of the lens to maximize visibility.
- Mounting and gasket fit: Flush-mount designs rely on rubber grommets. Verify hole diameter and depth to ensure a proper seal and to minimize water intrusion.
- Backup (reverse) lighting: If you frequently back up in dark areas, ensure the white backup LEDs are bright enough and wired for immediate override when in reverse.
- Kit contents: Some sets include rubber grommets, pigtails, and passenger-friendly wiring. A complete kit reduces extra shopping trips for installation hardware.
- Durability and weather exposure: Look for polycarbonate lenses and sealed housings. UV resistance helps guard against sun bleaching and cracking over time.
- Dimensional fit: Confirm outer diameter, inner diameter, and mounting height to ensure compatibility with your trailer’s opening and grommet size.
Frequently Asked Questions
- What is the difference between IP65 and IP67 in LED tail lights?
IP65 means the unit resists water jets; IP67 means it can be submerged briefly. Choose IP67 for exposed trailers. - Do these lights require a special ballast or wiring harness?
Most 4-inch LED tail lights use standard 3-prong wiring and 12V DC systems. Check your trailer’s harness compatibility. - Can I install multiple lights on a single trailer without issues?
Yes, provided your power supply and wiring are adequately rated, and you maintain proper voltage and grounding. - Is reverse lighting always white?
In these kits, yes; white is used for backup/reverse in addition to red for stop/turn signals. - Are rubber grommets included?
Many kits include rubber grommets and pigtails; verify the product listing to confirm all parts before installation. - What should I do if the LEDs seem dim?
Check for proper ground connection, verify correct wiring polarity, and ensure the power source is stable and within 12V DC range.