The Wisp in a Bottle is a Hardmode, post-PlanteraLight Pet item used to summon a light-providing Wisp that follows the player. While active, it is similar to the Flickerwick. The Wisp is brighter and keeps better pace with the player than other Light Pets, except the Suspicious Looking Tentacle and Jewel of Light which have the same light radius. It moves in accordance with the direction keys the player is pressing. The Wisps' movement range appears to be about 7 tiles to the left, right, and below the player's hitbox and 7 tiles above the Wisp's normal starting position.