2009

Control source radio buttons (Daylight system only)
Manual When chosen, you can manually adjust the location of the sun object
in your scene, as well as the intensity value of the sun object.
Date, Time and Location When chosen, daylight uses the geographically
correct angle and movement of the sun over the earth at a given location.
NOTE When Date, Time And Location is active, adjusting the light's intensity has
no effect.
5146 | Chapter 18 Lights and Cameras