A Glowing Solstice
Open the Details screen on a piece of Sunlit armor with no Kindling, and add the Small Kindling under armor mods.
Doing so will allow you to imbue the armor with Glowing Embers.
You know that with enough Kindling, more of your armor can be set aflame as well.
"I believe you know how to start a fire by now, yes?" —Eva Levante