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
Philips Master PL-C 13W Compact Florescent Bulb Extra Warm White (2700k) 2 Pin, G24d-1, 13 W : Amazon.co.uk: Lighting
PLS 13W 2700K 2 Pin Compact Fluorescent Bulbs by Lumenivo – Replacement for Philips 230102 Energy Saver
Feit Electric BPPL13 13 Watt Single Tube Compact Fluorescent Bulb 2 Pin Soft White: 2 Pin Base Compact Fluorescent Tubular Bulbs (017801005776-1)