    Most light sources are infinitely small points which emit light.  Point
 light sources are treated like shapes, but they are invisible points from
 which light rays stream out.  They light objects and create shadows and
 highlights.  Because of the way ray tracing works, lights do not reflect
 from a surface.  You can use many light sources in a scene, but each light
 source used will increase rendering time.  The brightness of a light is de-
 termined by its color.  A bright color is a bright light, a dark color, a
 dark one.  White is the brightest possible light, Black is completely dark
 and Gray is somewhere in the middle.

    The syntax for a light source is:
       light_source {
          <X, Y, Z>
          color red #, green #, blue #
       }
 where X, Y and Z are the coordinates of the location and 'color' is any co-
 lor or color identifier.

    Point light sources in POV-Ray do not attenuate, or get dimmer, with
 distance.
