This was said on Shabbos Zachor.
This is based on a Ma’amar of the Alter Rebbe, the reason and meaning of this practice is explained a little bit here,
אורה in feminine means how we become the Mashpia, this is a true infinity.
יקר which is usually not a sustainable light, becomes manageable because of Purim.
Tuning Yekar around, Tefillin. MP3