UNITEDLUX E26 Spiral CFL Light Bulbs Medium Base 13Watt (60Watt Equivalent) Soft White 2700K, 1040Lm Non-dimmable Compact Fluorescent Light, (16 Pack) - Amazon.com
13W Medium Base Daylight Mini Twister CFL Bulbs - 6 Pack - Amazon.com
Compact fluorescent lamp - Wikipedia
Shopper's Guide to Compact Fluorescent Light Bulbs | EWG
Feit Electric 13-Watt Equivalent PL CFLNI Quad Tube 2-Pin GX23-2 Base Compact Fluorescent CFL Light Bulb, Soft White 2700K (1-Bulb) BPPLD13/HDRP - The Home Depot
Feit Electric 60-Watt Equivalent T3 Spiral Non-Dimmable GU24 Base CFL Compact Fluorescent Light Bulb, Daylight 5000K (2-Pack) BPESL13T/GU24D/2HDRP - The Home Depot