Simply Conserve 18-Watt Equivalent CFLNI Horizontal G24Q PL LED Light Bulb in Daylight (20-Pack) L12PL50G24QH - The Home Depot
Viribright Lighting PL lamps 18-Watt EQ Single tube Cool White G24d-2 Pin Base LED Light Bulb in the General Purpose LED Light Bulbs department at Lowes.com
LED PL Retrofit Lamp for 2 or 4 Pin CFL Bulbs - Replaces 13-18 Watt- G24d / GX24d & G24q / GX24q Base Lamps - Magnetic Ballast Compatible or Bypass, 4000K and 560 Lumens