8x 18W G24q-2, 4 pin, Low Energy CFL BLD Double Turn Light Bulb Cool White Lamp | eBay
6pcs E-Simpo® 4P Gx24q to E26/E27 Lamp Base Adapter,G24q to Medium Edison Socket Converter,Need Bypass Ballast,Short Version 15.5mm, 4P Conductive,Plug E26 Bulb into PL G24Q/GX24Q Socket. : Amazon.com.au: Lighting
G24Q/ GX24Q to BC B22 4 PIN Adaptor Socket Converter Lamp Holder UK SELLER | eBay