CFL is commonly used at home for illuminating purposes. Some trivia to it would be; What is the base of your CFL? Knowing this will save you some trouble when you need to replace a spoilt lamp.
The 8 years old kind; GX23
Characteristics: 2 pins that are symmetrically side by side.
The recent kind; G24
Characteristics; 2 pins that have one slightly higher than the other. (well, i use this, what about you?)