Actors, props, lights, and cameras, also have internal names. For example a light might have the internal name "LIGHT3", you can change this name if you want, but be sure to change EVERY occurence if the name in the file, just do a global search and replace of "LIGHT3" with "MyLight 747", for example.

light LIGHT3
        {
        storageOffset 0 0.3487 0
        geomResource 7  
        lightType 0 
        name    Light 3