proc string[] getSelectedLights()

{
  string $selectedLights[];

  string $select[] = `ls -sl -dag -leaf`;

  for ( $shape in $select )
  {
    // Determine if this is a light.
    //
    string $class[] = getClassification( `nodeType $shape` );


    if ( ( `size $class` ) > 0 && ( "light" == $class[0] ) )
    {
      $selectedLights[ `size $selectedLights` ] = $shape;
    }
  }

  // Result is an array of all lights included in

  // current selection list.
  return $selectedLights;
}