Progress Lighting P7280-60EB Contoured, Shallow White Acrylic Clouds Diffuser Suspended From White Chassis 120 Volt High Power Factor Electronic Ballast, White White Finish White acrylic Size: 18-Inch Width, 4-5/8-Inch Height Extends 52-Inch Uses (4) 32-Watt F32T8 bulbs Progress Lighting has over 5,000 lighting fixtures offered in our catalog, the largest single source for residential and commercial lighting