Walk by any federal office building on any weeknight and it looks as though nearly all of the employees are burning the midnight oil. While these employees are undoubtedly hard workers, in reality most just haven't turned off the lights in their offices. It's estimated that 25% of an organization's electricity costs come from lighting. A government-wide movement to "Power Down" at the end of the day has the potential to save agencies substantial taxpayer dollars. Encouraging agency leaders to discuss it with employees and advertise it on intranet sites could create positive social pressure. "Powering Down" could even be mentioned in performance review conversations, as it is part of being a responsible community member. It could also be incorporated into contractual agreements with private custodial companies that come in after hours. Small measures like this could result in real savings over the long term.