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
16.5 Watt Vertical 2/4 Pin G24d GX24d G24q GX24q Base PL LED 120-277V – Green Electrical Supply
LED PL Retrofit Lamp for 2 or 4 Pin CFL Bulbs - Replaces 26 Watt- G24d / GX24d & G24q / GX24q Base Lamps - Magnetic Ballast Compatible or Bypass, 3000K and 1000 Lumens