E-Simpo 2pcs 2Pin in Parallel CFL G23 to E26/E27 LED Lamp Base Holder Light Socket Adapter, G23 to E26 Adapter. NOT G24d/GY24d/GX23 (G23 to E26/E27, Single Notch,2P in Parallel) - Amazon.com
Satco S8535 9W LED PL 2-Pin; 2700K; 900 Lumens; G24d Base; 50000 Average Rated Hours; 120 Deg. Beam Spread; Vertical; Type B; Ballast Bypass 50-Pack - Amazon.com
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
OSRAM DULUX D 18 LED-Lampe für G24D-2 Sockel, 7 Watt, 700 Lumen, Warmweiß (3000K), rotierbar, Ersatz für herkömmliches 18W-Dulux Leuchtmittel : Amazon.de: Beleuchtung
Osram Dulux-D 26W 827 Extra Warm White Colour G24d-3 Cap - Amazon.com