Fluorescent safety and security light is made of rugged die-cast aluminum housing for years of service. Use where energy efficiency and light color are important. Features include: Nighttime On/daytime Off, integral photocell, easy installation, mounting pattern included. 3600 lumens, CRI (Color Rendering Index) 85. Coverage area 3180 sq ft, distance 45'. Fixture operates on standard 120V (volts) 60 Hz (hertz) household current, bulb included. For mounting arm extension refer to Model No. EA24 (SKU 512257). Replacement bulb is 4U 65W (watt) mogul base Model No. 9166B (SKU 562424); cULus listed for wet location use. Photocell is not replaceable.