Returns a Transform value for the transform of light source. 
   Namespace:   Autodesk.Revit.DB.Lighting  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013 
Syntax
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Return Value
The light source transform.Remarks
 When the user moves or rotates the light source in family editor, the returned Transform gets changed accordingly.