hued

The Philips Hue light bulbs are remote-controllable LED lightbulbs. The control interface allows you to turn the lamps on or off, dim them, or change their color.

This application lets you set up schedules to automatically turn lights on or off, based on specific days, times, or relative to sunrise/sunset at your location. Special schedules can be created, e.g. to turn lights on and off while you are travelling.

The bulbs ship with iPhone and Android apps for managing them, but the app has only very rudimentary support for automated, day-to-day control.