little light of truth

While reading the short story A Doll's House by Henrik Ibsen, a symbolic light showed up constantly near the end.  I thought of a song I sang in my Sunday school class in second grade, "This Little Light of Mine".  In the story the light represents the truth and values.  As the song goes, "this little light of mine, I'm gonna let it shine..." the light stands for many different things, and in some cases can represent the truth.  The song goes on to say, "hide it under a bushel? No!..." and this can show that you should not hide the truth, and always be honest. 
In A Doll's House, near the end of act II Nora demands the lamp be brought in because she was uncomfortable and wanted to know if Dr. Rank was ashamed of his confession.  The light in the story reveals the truth.  In the dark room, many lies surround the Helmers, but when the lamp is present, the truth comes out.