Feit Electric 18-Watt Equivalent PL CFLNI Quad Tube 4-Pin G24Q-2 Base Compact Fluorescent CFL Light Bulb, Soft White 2700K (1-Bulb) BPPLD18E/HDRP - The Home Depot
G24 GX24 to E27 - 2 Pin OR 4 Pin Light Bulb Lamp Socket Converter Adaptor | eBay
Replacement for Osram Sylvania Dulux D/e 18w/827 Light Bulb by Technical Precision - 18w CFL Bulb with G24Q-2 4 Pin Base - Energy Efficient T4 Compact Fluorescent Light Bulb - 5.18 Inch - 1 Pack - - Amazon.com