The symbolic passing of the old god would be enacted, and every fire would be extinguished except for a single firepot guarded by the queen and her family at the temple. (Stalking Darkness, Lynn Flewelling)
This isn’t really explored in the novel, but if every fire is relit from the Queen’s fire, in some sort of cascading olympic torch relay, everyone ends up with a royal fire: a descendant of the fire lit by the Queen herself.
There might be some magic power in it too. Perhaps fires lit by certain kings and priests – and all their children fires – have magical powers. Fire has a lineage. In that case, an ordinary torch might become a magic treasure.
The Lineage of Fire actually strikes me as a decent idea for an entire campaign. There are many families of fire in the world, passed from generation to generation through candles and torches. The different fires may have different powers (the blue necrotic fire of the deeps, the golden radiant fire lit aeons ago by the Sun God, etc). The different lineages of fire war for dominance. The PCs may work for a fire instead of a noble house; and PCs’ torches might be among their most valuable weapons.
All of the fires of the world are united against some evils. This world is a circle of firelight, and hungry things prowl, outside, in the Dark, waiting for the flames to fail.