Adding Kindling to your Candescent armor has given you the ability to imbue it with Glowing Embers to improve its stats.
To do so requires the Silver Ash you acquired from the Bonfire Bash, and can only be done for the armor piece to which you applied the Kindling.
As expected, some of your Candescent armor's dormant power has been reignited by the Kindling. The Embers within it have already begun to glow.