Sunlite 13 Watt PL 2-PIN Single U-Shaped Twin Tube, GX23 Base, Warm White - Amazon.com
Amazon.com: Philips 146852, 13 Watt, 2-Pin Compact Fluorescent Light Bulb [Set of 10] : Tools & Home Improvement
Feit Electric 13-Watt Equivalent PL CFLNI Twin Tube 2-Pin GX23 Base Compact Fluorescent CFL Light Bulb, Cool White 4100K (1-Bulb) BPPL13/41/HDRP - The Home Depot