Buyers Products 4 Inch Round Stop/Turn/Tail Light with 18 LEDs is used on trucks and trailers to meet FMVSS/CMVSS 108 regulations. The light has a red lens and uses a PL-3 connection. Black grommets are also available for mounting. Lights are available in bulk (sold in multiples of 10) or individually in a kit that includes a grommet and plug for installation. They are backed with a limited lifetime warranty.
Specifications
| Amp draw at 12 Volts | 0.208 |
|---|---|
| Base / Mount Type | Recessed |
| Built-In Switch | No |
| Color | Red |
| Depth | - |
| Hard Wired or Plug | Plug |
| Height | - |
| Housing Material | Plastic |
| Lens Material | Polycarbonate |
| Lens Shape | Round |
| Number of Wires | 3 |
| Overall Width | - |
| Plug Included | No |
| Type of Plug | PL-3 Connection |
| Voltage | 12 |
| Wattage | 2.5 |
Advanced Technical Overview: 4 Inch Red Round Stop/Turn/Tail Light with 18 LEDs
The 4 Inch Red Round Stop/Turn/Tail Light with 18 LEDs represents a pinnacle of contemporary vehicle lighting technology, engineered to deliver superior visibility, enhanced safety, and exceptional longevity for a diverse range of commercial and recreational vehicles. This integrated lighting unit combines three essential rear-facing functions – stop, turn, and tail light – into a single, compact, and highly efficient assembly, critical for compliance with rigorous federal motor vehicle safety standards and operational reliability. Designed for deployment on trucks, trailers, and other utility vehicles, this product ensures that all requisite rearward illumination signals are conveyed with utmost clarity and precision, contributing significantly to road safety across varying operational conditions.
Functional Integration and Operational Principles
This lighting unit is a multi-function lamp, expertly designed to perform three distinct yet interconnected roles:
- Tail Light (Running Light) Function: When the vehicle's headlights are activated, the tail light function illuminates, providing continuous rearward visibility. This serves to delineate the vehicle's presence and dimensions, particularly during periods of low ambient light such as dusk, dawn, or nighttime operation, as well as in adverse weather conditions like rain or fog. The steady illumination of the 18 LEDs ensures a consistent and discernible visual signature for following traffic.
- Stop Light (Brake Light) Function: Upon application of the vehicle's brakes, the stop light function engages, signaling deceleration or a complete halt. The design leverages the full complement of 18 LEDs to produce an intensified and unmistakably bright red signal, rapidly alerting drivers behind to the braking action. The instantaneous illumination characteristic of LED technology significantly reduces reaction time for trailing vehicles compared to traditional incandescent bulbs, a crucial safety advantage in high-speed or heavy traffic scenarios.
- Turn Signal Function: When the driver intends to change lanes or make a turn, the turn signal function provides an intermittent, flashing red light. This dynamic signal communicates the vehicle's directional intent, preventing potential collisions. The bright, sequential, or synchronized flashing of the 18 LEDs ensures the signal is highly conspicuous, even in bright daylight or complex visual environments.
Advanced LED Technology and Performance Metrics
The adoption of Light Emitting Diode (LED) technology is central to the superior performance of this lighting product. Compared to conventional incandescent bulbs, LEDs offer a multitude of advantages that translate directly into enhanced reliability, efficiency, and safety for vehicle operators:
- Exceptional Longevity: LEDs boast a significantly longer operational lifespan, often exceeding 50,000 hours, which vastly outlasts incandescent bulbs (typically 1,000-5,000 hours). This extended lifespan drastically reduces maintenance frequency and associated costs, minimizing vehicle downtime for bulb replacement – a critical factor for fleet operators and commercial entities.
- Superior Durability and Vibration Resistance: Unlike incandescent bulbs which rely on delicate filaments susceptible to breakage from road vibration and impact, LEDs are solid-state devices. This inherent robustness renders them highly resistant to mechanical shock and vibration, making them ideally suited for the demanding environments encountered by trucks and trailers.
- Enhanced Energy Efficiency: Operating at a mere 0.208 Amperes (A) at 12 Volts (V), resulting in a low wattage of 2.5 Watts (W), this LED light consumes substantially less electrical power than incandescent alternatives. This reduced current draw translates into lower load on the vehicle's electrical system, potentially improving fuel efficiency by reducing alternator strain and extending battery life.
- Instantaneous Illumination: LEDs illuminate instantaneously, achieving full brightness in microseconds. This rapid activation time is a critical safety feature for stop lights, providing following drivers with earlier warning of braking actions, thereby increasing their reaction time and reducing the potential for rear-end collisions.
- Brighter and More Uniform Light Output: The 18 high-intensity LEDs are designed to produce a consistently bright and uniform red light. This ensures optimal visibility across the entire surface of the 4-inch lens, enhancing the signal's impact and readability from various angles and distances.
- Color Consistency: LEDs produce a pure, consistent red light without the color shift that can occur with incandescent bulbs over time due to filament degradation or colored lenses fading. This maintains regulatory compliance and ensures the signal is always interpreted correctly.
Regulatory Compliance: FMVSS/CMVSS 108
A cornerstone of this product's design is its full compliance with Federal Motor Vehicle Safety Standard (FMVSS) 108 in the United States and Canadian Motor Vehicle Safety Standard (CMVSS) 108 in Canada. These comprehensive regulations govern all vehicle lighting, signaling, and reflective devices, establishing stringent performance requirements to ensure driver visibility and conspicuity, thereby minimizing accident risk.
- FMVSS 108 Requirements: For stop/turn/tail lights, FMVSS 108 mandates specific photometric intensity levels, beam patterns, and color characteristics for each function. The standard dictates minimum and maximum light output at various angles to ensure effective signaling under diverse environmental conditions. It also specifies the size, location, and operational characteristics (e.g., flash rate for turn signals) of these lamps. The 4-inch red round form factor and 18-LED configuration of this product are engineered to meet or exceed these exact specifications, providing reliable and legally compliant illumination.
- CMVSS 108 Parallelism: CMVSS 108 largely harmonizes with FMVSS 108 regarding rear lighting devices, ensuring that vehicles operating across the North American continent maintain consistent safety standards. Compliance with both standards underscores the universal applicability and safety assurance provided by this lighting unit.
- Importance of Compliance: Adherence to these standards is not merely a legal requirement; it is fundamental to road safety. Compliant lighting ensures that vehicle signals are unambiguously interpreted by other road users, preventing confusion and enabling timely reactions. For commercial vehicles, non-compliance can lead to significant fines, vehicle impoundment, and increased liability in the event of an accident.
Materials and Construction for Enduring Performance
The selection of materials and the robust construction methodologies employed in this light are paramount to its long-term reliability and resistance to harsh operating environments.
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Lens Material – Polycarbonate: The lens is fabricated from high-grade polycarbonate. This material is chosen for its exceptional properties:
- Impact Resistance: Polycarbonate is renowned for its outstanding impact strength, making the lens highly resistant to chipping, cracking, or shattering from road debris, gravel, or minor collisions.
- UV Stability: Integrated UV inhibitors protect the lens from degradation due to prolonged exposure to solar radiation. This prevents yellowing or clouding over time, ensuring the red color remains vibrant and the light output clear and consistent throughout the product's lifespan.
- Optical Clarity: Polycarbonate offers excellent optical transparency, allowing for efficient transmission of light from the LEDs while maintaining precise beam control and signal integrity.
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Housing Material – Plastic: The housing is constructed from a durable plastic compound, likely an automotive-grade ABS or similar polymer. This material provides:
- Corrosion Resistance: Plastic housings are impervious to rust and chemical corrosion, common issues with metallic housings, particularly in environments exposed to road salts, chemicals, or maritime air.
- Lightweight Design: The plastic construction contributes to the overall low weight of the unit, reducing vehicle tare weight and simplifying installation.
- Thermal Stability: Engineered to withstand a wide range of operational temperatures, from extreme cold to intense heat, without compromising structural integrity or sealing.
- Electrical Insulation: The plastic housing provides inherent electrical insulation, enhancing safety.
Mounting and Connectivity Solutions
The design of this 4-inch round light prioritizes ease of installation and secure integration into vehicle systems:
- Recessed Mounting: The light is designed for recessed mounting, providing a flush, low-profile appearance. This method minimizes protrusion from the vehicle surface, reducing the risk of damage from impacts and enhancing the vehicle’s aesthetic. Recessed mounting also contributes to a more aerodynamic profile, an often-overlooked benefit for commercial vehicles.
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Grommet System: Black grommets are available for mounting. These pliable rubber or synthetic polymer components serve several critical functions:
- Secure Fit: Grommets create a snug, vibration-dampening fit for the light within the mounting hole, preventing rattling and loosening over time.
- Environmental Sealing: They form a crucial seal between the light housing and the vehicle body, preventing water, dirt, and dust from entering the vehicle's electrical system or the light's internal components. This is essential for maintaining the integrity of the wiring and the longevity of the light.
- Vibration Dampening: The elastic nature of the grommet absorbs road shock and vibration, protecting the delicate internal electronics of the LED light and extending its operational life.
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PL-3 Connection: The light utilizes a standard PL-3 connection type. The PL-3 plug is a widely adopted industry standard for heavy-duty truck and trailer lighting, offering distinct advantages:
- Reliable Electrical Contact: The design ensures a secure and stable electrical connection, minimizing resistance and preventing intermittent operation.
- Weather Resistance: PL-3 connections are engineered for environmental sealing, often incorporating watertight seals to protect against moisture and corrosion at the wiring interface.
- Ease of Installation and Replacement: The plug-and-play nature of the PL-3 system simplifies initial installation and facilitates quick, tool-free replacement of the light unit if ever required. This reduces labor costs and vehicle downtime.
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Three-Wire Configuration: The 3-wire system is standard for stop/turn/tail lights, typically comprising:
- Ground (often white wire)
- Tail/Running Light (often brown or black wire)
- Stop/Turn Signal (often red or green/yellow wire)
Applications and Target Markets
The versatility and robust construction of the 4 Inch Red Round Stop/Turn/Tail Light make it an ideal choice for a broad spectrum of applications and market segments:
- Commercial Trucking: Essential for heavy-duty trucks, tractor-trailers, box trucks, and delivery vehicles, where durability, reliability, and FMVSS/CMVSS compliance are paramount.
- Utility and Equipment Trailers: Perfect for cargo trailers, utility trailers, boat trailers, and recreational vehicle (RV) trailers, providing necessary visibility and signaling for towed equipment.
- Agricultural Equipment: Suitable for farm machinery and implements that require road legal lighting for transport between fields or on public roads.
- Construction Vehicles: Can be integrated into various construction equipment that operates on public thoroughfares, requiring robust lighting to withstand demanding job site conditions.
- OEM and Aftermarket: Its standardized design and high-quality construction make it suitable for both original equipment manufacturers (OEMs) integrating lights into new vehicle builds and aftermarket applications for upgrades or replacement of existing lighting systems.
- Fleet Management: The product's longevity and energy efficiency offer significant cost savings for fleet managers through reduced maintenance, lower power consumption, and enhanced vehicle safety, contributing to fewer accidents and insurance claims.
Commitment to Quality and Customer Assurance
Buyers Products backs this 4 Inch Red Round Stop/Turn/Tail Light with a limited lifetime warranty. This warranty is a testament to the manufacturer's confidence in the engineering integrity, material quality, and manufacturing precision of the product. A limited lifetime warranty signifies protection against defects in materials and workmanship for the expected operational life of the product under normal use. This commitment provides end-users, fleet operators, and distributors with significant peace of mind, ensuring a reliable product and minimizing potential long-term ownership costs associated with premature failure or manufacturing faults. It underscores the brand's dedication to delivering high-performance, durable lighting solutions that meet the demanding requirements of commercial and industrial applications.
Conclusion
The 4 Inch Red Round Stop/Turn/Tail Light with 18 LEDs is a meticulously engineered, high-performance lighting solution that integrates advanced LED technology, robust materials, and compliance with critical safety standards. Its multi-functional capability, low power consumption, exceptional durability, and ease of installation make it an indispensable component for ensuring the safety and legal operation of trucks, trailers, and other utility vehicles. With its superior visibility, extended lifespan, and comprehensive warranty, this product offers an unparalleled value proposition for discerning buyers seeking reliable, efficient, and compliant vehicle lighting.
