|  Light  | 
 Specifies whether the .NET object represents a valid Revit entity. 
 Namespace: Autodesk.Revit.DB.Lighting
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
 If the corresponding Revit native object is destroyed, or creation of the corresponding object is undone, a managed API object containing it is no longer valid. API methods cannot be called on invalidated wrapper objects.