You summon a large volume of fireflies to illuminate a 15-foot-radius sphere for the duration. A few of the fireflies will settle on hidden or invisible creatures, making them somewhat easier to find. Attack rolls against invisible creatures in the area are no longer made with disadvantage, though attack rolls made by invisible creatures are still made with advantage, for only their general position is clearer by firefly light, not their specific movements. All hide actions taken in the area are made with disadvantage.