Star Studded Doublet

Armour (padded or light), very rare (requires attunement)

This armour provides a +1 bonus to armour class. The studs on this armour, which appear to be made of a hard non-metal material, seem to glow when in sunlight. The wearer of this armour is not illuminated at all by star or moonlight, and they cast no shadow when exposed to such light. They have advantage when attempting stealth checks when in complete darkness, or when they are only illuminated by moon or star light.

Once per short rest an action the wearer can cause the star-studs to glow brightly, emitting dim light to 10ft. This light lasts for 10 minutes, and can be ended early with a bonus action. Creatures with any kind of sunlight sensitivity find this light irritating, and it causes them harmless but intense pain. Sunlight sensitive creatures have disadvantage on all attacks against the target. They also have disadvantage on concentration checks while in the dim light of this armour, as it is incredibly distracting.