A default setting on all computers and monitors to power off after the user has left for the day would save energy and, consequently, money.
Even in sleep modes, a computer and monitor may consume up to 60 watts. Considering the number of computers used by the federal government and the number of hours the computers are not in use, huge savings are possible.
Windows operating systems have a hibernation function which could be set to power down after a certain period of inactivity or at a certain time. Setting computers to hibernate after a sufficiently long period of time would ensure that users only have to wait for the computer to boot in the morning. Money and energy can be saved by keeping computers off when not in use overnight.