       SippLightSourceCreate {x y z} color [type]
              Create a new lightsource in the scene.  If a direc-
              tional lightsource is created these {x y z}  speci-
              fies  a  vector  in  the  direction  that the light
              emanates the lightsource.  If it is a point  light-
              source they specify the exact location of it. Color
              specifies the color and  intensity  of  the  light.
              Type  is  either  `DIRECTION'  or `POINT', if it is
              omitted, `DIRECTION' is assumed.  A light handle is
              returned by the command.
