Philips 100-Watt Equivalent Cool White (4100K) T2 CFL Light Bulb (1-Pack) 414060 - The Home Depot
Compact fluorescent lamp - Wikipedia
G.E. to Phase Out CFL Bulbs - The New York Times
Compact fluorescent lamp - Wikipedia
Feit Mini Twist 13 W 2.09 in. D X 3.6 in. L CFL Bulb Daylight Spiral 6500 K 1 pk - Ace Hardware
Feit Electric 13-Watt Equivalent PL CFLNI Quad Tube 4-Pin G24Q-1 Base Compact Fluorescent CFL Light Bulb, Cool White 4100K (1-Bulb) BPPLD13E/41/HDRP - The Home Depot