Shalom, is there any minhag or halakha to light candles for Mordechai and Esther in purim?
I am not awre of such a minhag. There is however a minhag to have candles lit after the megillah on the eve of Purim and to light candles by the Purim meal. Both in order to add to the festive atmosphere.
Have a happy Purim.
ShareiTeshuva O:CH 595-1, M:B 595-3.