Die-cast aluminum housing, door with stainless steel bail latch, Integral hinges for hands-free maintenance and tool-less entry, Optical design creates consistent distribution and scalability, Choice of 12 high-efficiency, patent pending AccuLED Optics™, Offered standard in 4000K (+/- 275K) CCT and nominal 70 CRI, Suitable for operation in -40°C to 40°C ambient environments, 120-277V 50/60Hz, 347V 60Hz or 480V 60Hz operation, Proprietary circuit module withstands 10kV of transient line surge, Five-year limited warranty