Retrieving your light:
First, you need to climb to the fourth floor of a specific tower in The Garden of Ru'Hmet, which are located in the five points of the map.
Each tower corresponds to one of the five races.
Light of Mea - Elvaan.
Light of Dem- Mithra.
Light of Holla- Tarutaru.
Light of Vahzl- Humes.
Light of Al'Taieu- Galka.
This can be done solo, or with your party, but each person will need to get to the top of their corresponding tower.
Once at the fourth floor, check the Ebon Panel for a cutscene and a new title