Lithonia Lighting Fluorescent Square 4 lamp, 4 feet, 120V Wraparound Light, 32W T8 Square-basket wraparound fluorescent ceiling fixture for offices, storage rooms, and more Acrylic diffuser with side prisms to control brightness and bottom prisms to reduce lamp images Instant-on ballast eliminates flickering/humming; won't interfere with other electronic equipment Hinged design for easy maintenance; uses 4 32-watt T8 fluorescent bulbs (not included) Measures approximately 48 inches long by 14 inches wide by 3 inches high