The LaserWriter 16/600 PS is Energy Star compliant. The LaserWriter 16/600 PS ships with a new Apple Printer Utility program that can be used to change the time delay before the printer enters the energy saving mode. The default time is 1 hour, but the other choices are 15 minutes, 30 minutes, 2 hours, and 4 hours. The majority of energy savings occurs because the fuser bulb is shut down while the printer is in the energy saving mode.