Explosionproof Fluorescent Light Fixture, Lamp Type T12, Rapid Start, Lamp Base Recessed Double Contact, Number of Lamps 4, Ballast/Line Voltage 120 to 277 VAC at 50/60 Hz, Lamp Wattage 60 W, Ballast Type Class P, Minimum Starting Temperature -29 Deg C, Reflector Type White Baked Enamel Inside Gray Epoxy Outside, Number of Hubs 3, Hub Size 3/4 Inch Threaded, Width 23-1/2 Inch, Height 11-7/16 Inch, Housing Material Copper Free Aluminum, Housing Finish Gray Epoxy, Enclosure Class I Div 1 and 2 Group C D, Class II Div 1 and 2 Group E F G, Class III, Approval UL 1598/844, Application Pharmaceutical Firms, Paint Manufacturing Plants, Printing Plants, Ignitable Dust Location, Fumes/Gases/Paint Residue/Paint Powder/Corrosive Atmospheres, Hazardous Location