Create a new lightsource in the scene. If a directional lightsource is created these \fR{\fIx\ y\ z\fR} specifies a vector in the direction that the light emanates the lightsource. If it is a point lightsource 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.