Power settings for monitors can be set via the procedure for computers described on the previous page. It doesn’t take much energy to power up a monitor, and the Department of Energy recommends that you turn off your monitor manually or automatically if you will be away from your computer for more than twenty minutes.
The two main types of computer monitors in use today are cathode ray tube (CRT) and liquid crystal display (LCD) monitors. It used to be the case that CRTs displayed better colors, refreshed faster, and cost less than LCDs. While CRTs are still slightly cheaper, LCDs have caught up in nearly all important benchmark categories. LCDs are thinner and more environmentally friendly; they consume half the power and release only a small amount of heat. See LCD vs CRT or LCD vs CRT – Pros and Cons for more detailed comparisons.