Satco S8356 T4 Quad Tube Compact Fluorescent Lamp 42 Watt 4-Pin GX24q-4 Base 3200 Lumens 82 CRI 4100K Cool White HyGrade&trade; Satco - 42 watt; pin-based Compact Fluorescent; 4100K; 82 CRI; GX24q-4 (4-Pin) base