All light source parameters can be animated in the same way as all other animations:
Set a value in the Light editor.
Add a Key Frame.
Change the value.
Add a Key Frame again.
Animations can also easily be created in one of the orthogonal views. There, the light sources show as symbols, and by repositioning them and adding Key Frames, animation sequences are created. For more information, see Light Visualization.
More advanced light source animations are normally created with the light source tracking feature, see To Set a Light to Track Containers.
For more general animation information, see Create Animations.