Technical Precision Replacement for Philips PL-S-9W/TUV G23 Base - Amazon .com
Philips 908400 - PL-S 9W/84/4P Single Tube 4 Pin Base Compact Fluorescent Light Bulb - Amazon.com
10-Pack) Philips 458430 10.5PL-C/T LED/26V-4000 IF 4P 10.5-Watt LED Plug & Play Lamp Replacement for 4-Pin CFL Light Bulb, Vertical Mount (4000K) - Amazon.com