1T-L13RI is a Four Inch Round LED Tail lamp. This is a Class Eight Long Haul High Diode Count Tail Lamp with a Hard Wired Pig Tail that has a standard Three Way Female Plug for easy Plug In to a Harness. This Light is a SAE/DOT certified Multi-Function Stop Turn Tail Lamp. An excellent Long Lasting Over the Road Tail Lamp, Water Proof and Submersible. Durable Polycarbonate Construction. The Light Features a Brilliant 44 LED Light Pattern with a Crystal Clear Lens and Brilliant Red LEDS that has been a favorite Amongst Owner Operators. LED Technology is Fast Acting Providing early warning of Braking or Turning Actions. The light mounts with a durable Polycarbonate Flange that houses and protects the lights conformal coated circuit board and is sonically welded to the lens for a tough water tight seal. Screw holes are provided for a secure no tamper mount.