One 20 watt bulb with an output of 75 watt. Good for lamps where you need brighter light.

I can't say enough good things about CFL's and if you don't know how great they are already, you'll wonder why you haven't switched to them already, CFL stands for compact fluorescent lamp. They are energy saving and have a long life, since one bulb actually lasts 8 thousand hours, as much as 8 standard bulbs put together, and each one uses 75% less electricity.