Lighting Pro is an application that automates all of your Philips Hue lights. You can let your indoor lights go on at a specified time before sunset and let them change during the evening, as it is getting darker outside and cosy inside. In case you have one or more lights outside, you can use them as a garden light and, for safety, may choose to keep them on all night, even when you go to bed and hit the "All Off" switch.
Further more, you may also link one or more off your calendars to it, so the system knows if you have to get up early tomorrow. If you do so, your morning lights will be on and awaiting you when you get downstairs.