If you have a magic item that is capable of generating some sort of persistent, non-concentration effect, what happens when you remove/drop/give the item to someone who is not attuned to it?
Specifically I'm thinking about the Holy Symbol of Ravenkind from Curse of Strahd and its Sunlight property, but there might be other items that fall into this category.
HOLY SYMBOL OF RAVENKIND
Wondrous item, legendary (requires attunement by a cleric or paladin of good alignment)
Sunlight. As an action, you can expend 5 charges while presenting the holy symbol to make it shed bright light in a 30-foot radius and dim light for an additional 30 feet. The light is sunlight and lasts for 10 minutes or until you end the effect (no action required).