In Vedanta Sara, the enlightenment is called Brahmakara Vittya or Advaita Vedanta. Once ignorance is removed, it will never come back again says Sushupi. The question was raised if after that moment of enlightenment, does that enlightenment flash? And the answer was, no, it doesn't. It also becomes part of the world of appearance, and you are that Brahman in which waking, dreaming, deep sleep come and go.