Satco S8331 3500K 13-Watt G24q-1 Base T4 Quad 4-Pin Tube for Electronic and Dimming Ballasts Manufacturer: SATCO PRODUCTS Manufacturer Part Number: S8331 Saco Pl Type Compact Fluorescent Lamp, T4, Dual Tube, 13 Watt, 3500K, 82 Cri, G24Q-1 Base - 2491723 12000 Average rated hours 13-Watt G24q-1 base 3500K neutral bulb