One-piece heavy-wall, die-cast aluminum housing and door, Choice of 11 high-efficiency, patent pending AccuLED Optics™, Offered standard in 4000K (+/- 275K) CCT and nominal 70 CRI, Suitable for operation in -30°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, Optional swing-down removable power tray for ease of maintenance, Features a 5-year warranty