100-Watt Equivalent A21 Spiral Non-Dimmable E26 Medium Base CFL Compact Fluorescent Light Bulb Soft White 2700K (4-Pack) ESL23T2/4/ESM - The Home Depot
Amazon.com: HPUSN 85W 110V 5400K Compact Fluorescent CFL Balanced Daylight Bulb with E27 Mount, Lighting Studio Ideal for Photography and Video : Electronics
Which light bulbs need a ballast?
Xtricity Compact Fluorescent Light Bulb T2 Spiral CFL, 4100k Cool White, 9W (40 Watt Equivalent), 540 Lumens, E26 Medium Base, 120V, UL Listed (Pack of 2) - Amazon.com
Feit Electric Compact Fluorescent Light Bulbs with Mogul Base, 65W - Walmart.com
Compact Fluorescent Lightbulbs (CFL Bulbs) » Recycle This Pittsburgh
Feit Electric 13-Watt Equivalent PL CFLNI Quad Tube 2-Pin GX23-2 Base Compact Fluorescent CFL Light Bulb, Cool White 4100K (1-Bulb) BPPLD13/41/HDRP - The Home Depot
Utilitech Cool White Medium Base (e-26) Light Bulb in the Tube Light Bulbs department at Lowes.com
Specifications of the Tornado Compact fluorescent Spiral bulb 8718696514023 | Philips
Shopper's Guide to Compact Fluorescent Light Bulbs | EWG