Know when its time to replace a monitor
If you have a CRT model, you can achieve significant energy and space savings (50 to 80%) by migrating to one of the LCD models on the TopTen list instead.
Today’s best new LCDs also use significantly less energy than 4- to 6-year-old LCD models of the same size, but some of those savings can be lost if you trade up to a bigger model in the process. If your LCD is less than 3 years old, the energy benefit of upgrading is likely to be smaller
