I can’t seem to find any info on this so I will ask but can you change the light color? For example for a sunset can I change the lamp color to orange?
You can set a light’s color in the lamp buttons of the shading context (F5), on the lamp panel.
For a sunset, playing with ambient light might be useful, too: http://wiki.blender.org/index.php/Manual/Ambient_Light
Thanks much ^^