Amazon.com: LED GX24Q/G24Q 4-Pin Base Light Bulb, No Ballast 22W (42W CFL/Compact Fluorescent Lamp Equivalent) GX24 LED PL-C Recessed Lamp, Remove/Bypass The Ballast, Daylight 6000K
Technical Precision Replacement for Philips PL-T42w/35/4p Light Bulb 42W CFL Bulb with GX24Q-4 Base - 4100K 4 Pin Compact Fluorescent Light Bulb - 1 Pack - Amazon.com
Feit Electric 42-Watt PL CFLNI Triple Tube 4-Pin Plug-in GX24Q-4 Base Compact Fluorescent CFL Light Bulb, Cool White 4100K(10-Pack) PLT42E/41/10 - The Home Depot