You can set an Up vector for any light. 
         
         To define a light’s Up vector:
         
         
            - Select the light in either the Scene browser or the Viewer window. 
- Alt-drag an object or marker from the Viewer window into the Navigator or Property window’s Light Settings Up Vector field
               to assign an Up Vector to the light. 
            
- Click the Up Vector field to select the light’s Up Vector, and then translate it. 
 Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
 Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License