       SippLightSourcePut light {x y z}
              This  command  is  used to modify the direction, or
              position, of a  lightsource.  If  the  light  is  a
              directional light, then x, y, z are a vector in the
              direction that the light emanates.  If the light is
              a  point  lightsource, then x, y, z are the coordi-
              nates of the new location of a light.
