Simply Conserve 26-Watt Equivalent CFLNI Horizontal G24D PL LED Light Bulb 5000K in Daylight (4-Pack) L12PL50G24DH-4 - The Home Depot
13-18 Watt Equivalent PL Lamp G24D-2P (2-Pin) Benchmark II Vertical LE
E-Simpo 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)