"500 Series Linear Super-LED® Dependable 500 Series lightheads are designed for mounting versatility and high-intensity light output. 500 Series V-Series™ Dependable 500 V-Series lightheads are designed for mounting versatility and high-intensity light output. 500 Series TIR6™ Super-LED Dependable 500 Series lightheads are designed for mounting versatility and high-intensity light output."