Nason NS-LB15200 series low bay luminaires deliver energy savings up to 70% over conventional HID systems and offer years of zero maintenance operation that is significantly longer than fluorescent fixtures. These rugged low bay fixtures provide high quality lighting with superior uniformity and excellent vertical light distribution for applications in warehouses, parking garages, office complexes, light commercial facilities, and other installations with mounting heights of 20 feet (6 meters) and less. The modular design offers diverse configuration options for different application requirements on lumen delivery. Driverless technology eliminates the weakest component in LED luminaires and offers improved system reliability without compromising efficiency and generating flicker. Precision injection-molded polycarbonate lens provides maximum low glare uniform illumination. High performance SMD LEDs in conjunction with high efficiency optics deliver a system luminous efficacy of 125 LPW. Heavy-duty, extruded aluminum housing provides superior heat sinking than ensures the luminaire's performance in high ambient temperatures. All exposed aluminum surfaces are finished with UV resistant polyester based powder coating for excellent resistance to corrosion. The lighting system is sealed and gasketed, providing an IP65 rating.