Satco S8336 4100K 18-Watt G24q-2 Base T4 Quad 4-Pin Tube for Electronic and Dimming Ballasts Manufacturer: SATCO PRODUCTS Manufacturer Part Number: S8336 Saco Pl Type Compact Fluorescent Lamp, T4, Dual Tube, 18 Watt, 4100K, 82 Cri, G24Q-2 Base - 2491726 12000 Average rated hours 18-Watt G24q-2 base 4100K cool bulb