One-piece, low-copper, die-cast aluminum housing, Formed-aluminum faceplate secured via four stainless steel fasteners, Choice of nine high-efficiency, patented AccuLED Optics™, 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, Four mounting configurations, Five-year warranty