Stop Turn Tail LED Light - Red 4 Inch 10-Diode 571.LD40R10-1

• 10-Diode High Lumen Output: Features 10 high-intensity LEDs that provide significantly more brightness and a faster response time than standard incandescent bulbs, greatly increasing highway safety.
• Moisture-Proof Polycarbonate Lens: The durable, sonic-welded polycarbonate lens prevents moisture and road salt from entering the housing, protecting the diodes from corrosion and premature failure.
• Integrated PL-3 Connection: Equipped with a standard PL-3 three-pin connector on the back, allowing for a fast, hassle-free "plug-and-play" connection to your existing trailer wiring harness.
• DOT & SAE Compliant: Fully meets or exceeds DOT, SAE (STI2I6), and FMVSS requirements, ensuring your vehicle stays compliant and safe during roadside inspections.
• Universal Grommet Mount: Precision-molded to fit any standard 4-inch round rubber grommet, making it a seamless upgrade for virtually any commercial truck or trailer.

Ensure your trailer is seen from a mile away with this premium aftermarket Red 4 Inch LED Light distributed by FleetPro Parts & Tires. Dim, flickering, or burnt-out incandescent tail lights are a leading cause of rear-end collisions and guaranteed DOT inspection failures. Manufactured by Automann to strict Fleet Standard specifications, this high-performance Stop/Turn/Tail (S/T/T) light utilizes advanced LED technology to provide instant-on response times and superior brightness compared to traditional bulbs. We stock these heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets, trailer repair shops, and owner-operators nationwide.

High-Lumen Visibility: The Red 4 Inch LED Light Advantage

This Red 4 Inch LED Light is engineered to survive the brutal vibrations and weather exposure of commercial over-the-road hauling. It features 10 high-output diodes protected by a rugged, sonic-welded polycarbonate lens that creates a permanent, moisture-proof seal. The integrated PL-3 male connector on the back makes for a fast "plug-and-play" installation into existing wiring harnesses. Designed for standard 4-inch round grommet mounting, this 12V light is the perfect upgrade for any rig needing dependable, long-lasting rear illumination.

At FleetPro Parts & Tires, we know that compliance is king. This Automann LED light meets all DOT, SAE (Code: STI2I6), and FMVSS requirements, ensuring your truck or trailer remains 100% road-legal. It acts as a direct, high-efficiency replacement for highly searched industry numbers like Truck-Lite 44302R, Optronics STL43RB, and Peterson 417R-3. Switch to LED today and stop worrying about blown bulbs on the highway.

Vehicle Fitment & Compatibility

This heavy-duty aftermarket LED light features a universal design intended for the following commercial applications:

• Make/Model: Universal Class 8 Trucks, Commercial Trailers, and Utility Vehicles
• Mounting Style: Standard 4" Round Grommet Mount
• System Requirement: 12-Volt DC Electrical Systems
• Component Group: Exterior Lighting / Rear Signal Lights

Direct Replacement & Cross-Reference Numbers:

This Automann LED light serves as a direct exact-fit replacement for the following part numbers:

• Truck-Lite Interchange: 44302R, 4058, 40583
• Optronics Interchange: STL43RB
• Peterson Interchange: 417R-3, 826R9, 54342
• Uni-Bond Interchange: LED4000-10R
• Automann Distributor #: 571.LD40R10-1

Technical Specifications

• Component Type: Stop / Turn / Tail (S/T/T) LED Light
• Size & Shape: 4-Inch Round
• Diode Count: 10 High-Output Diodes
• Lens Material: Waterproof Polycarbonate (Red)
• Connection: Integrated PL-3 Male 3-Pin Plug
• Voltage: 12V DC
• Product Level: Fleet Standard Aftermarket
• Brand: Automann (Distributed by FleetPro Parts & Tires)