Original reporter: ncruces
Auto parameters such as light_position_array are incredibly helpful for multiple light, single-pass shading. Some light related parameters don't have array versions, however.
In particular, I've ended up not using shadow_scene_depth_range (not that it was impossible to) because of this.
Original Mantis Ticket: http://www.ogre3d.org/mantis/view.php?id=380