SYLVANIA 13-Watt EQ Double tube Soft White Light Fixture CFL Light Bulb in the CFL Bulbs department at Lowes.com
13 Watt GU24 Base CFL Light Bulb by Feit - Walmart.com
Feit Electric 13-Watt (60 W Equivalent) Spiral GU24 Pin Base Cool White (4100K) CFL Bulb at Lowes.com
Satco 13-watt Fluorescent T2 Spiral CFL Bulb - 13 W - 120 V AC - Spiral - T2 Size - Soft White Light Color - E26 Base - 12000 Hour - 4400.3°F (2426.8°C) Color Temperature - 82 CRI - Energy Saver - 4 / Box - Filo CleanTech
UNITEDLUX 13 Watt (60 Watt) Compact Fluorescent Light, Soft White 2700K, 1040LM, Spiral Medium Base CFL Light Bulbs (4 Pack)