8 Pack) 18 Watt Compact Fluorescent Light Bulb 2700K Warm White 4 Pin G24q-2, Replacement for Sylvania 20683 and Philips 38329-9 - PLC 18W/827/4P/ALTO - Amazon.com
Philips 21w Triple Tube 4-Pin GX24Q-3 Warm White 3000K Fluorescent Lig – BulbAmerica
120V 18w 4-Pin Twin Tube Warm White Compact Fluorescent Light Bulb - CFT18W/4P/827 (S8333) by Satco
Feit Electric 18-Watt Equivalent PL CFLNI Quad Tube 4-Pin G24Q-2 Base Compact Fluorescent CFL Light Bulb, Cool White 4100K (1-Bulb) BPPLD18E/41/HDRP - The Home Depot