You can create schedules in the LIFX app, that automatically adjust everyday, based on the sunrise and sunset.
- Tap the + Button on the main screen
- Choose 'New Schedule'
- Tap 'Start Time'
- At the top of the screen, choose "With The Sun"
- Allow the app to use your GPS location
- Choose Sunrise, or Sunset
- Choose to start right then, or tap Start time to start before or after the Sunrise/Sunset
- Choose your bulbs, colors, and you're good to go.
The video above gives you a quick look at how to setup Solar schedules, for your lights.