( Herian's smile brightens, relief and delight mixing together. It's the sort of smile only Cosima tends to see from her, and she steps closer, one hand coming to rest at Cosima's waist as she holds the other out to hold the box, to make the trying on of the ring a little easier. )

It's enchanted. Whenever you have need of light, you just need to focus for a moment, and it should illuminate the space around you. I believe the trader said that between uses it needs to recharge in the light of the sun or the moons, but wearing it or leaving it on the windowsill should be sufficient.