E-Simpo G24d to E27 Adapter, 2P Light Socket Adapter, 21.8mm,G24 to E26/E27, GX24d to E27 Lamp Base Converter, Rohs.Need Bypass The Ballast! (60-Pack) - - Amazon.com
Amazon.com: Satco S8327, 3500K 26-Watt G24D-3 Base T4 Quad 2-Pin Tube for Magnetic Ballasts, Compact Fluorescent Bulb (Pack of 10) : Tools & Home Improvement
G24d to E26/E27 Adapter (NOT GY24d)2 Pin CFL Socket Adapter 21.8mm G24 to E26/E27, GX24d to E26/E27 Lamp Base Converter,Rohs. 2P in Cross, Need Bypass The Ballast! (10-Pack) - Walmart.com