GE, F32T8/XL/SPX50HLECO, 4', 32W, T8, 1" Diameter, Ecolux Fluorescent Bulb, Medium Bi-Pin Ends, 3,000 Lumens, Rated Life: 36,000 Hours @ 12 Hours Per Start, Color Temperature: 5,000 Kelvins, Cri=80, Higher Lumens Than Standard 32W 4' Bulbs, Ease Of Disposal.