Osram 133531 - FPL18EX-N Single Tube 4 Pin Base Compact Fluorescent Light Bulb - - Amazon.com
Osram Dulux L 18W 830 | Warm White - 4-Pin| Any-lamp
Feit Electric 13W/18W/26W Equivalent PL Horizontal 4-Pin Universal Base G24Q/GX24Q-1/-2/-3 with CCT Select LED Light Bulb (4-Pack) PL26AHCCT/LED/HDRP/4 - The Home Depot