The Heart Lantern is obtained by crafting 1 Life Crystal and 4 Chains. It is a decorative item that can be placed by clicking underneath a block which has two blocks of air beneath it. It gives off pink light and a shiny particle effect, and functions as an acceptable Light Source. They are 2 blocks high and 1 block wide. The Heart Lantern grants a health regeneration buff called 'Heart Lamp'. This will occur within a 50 block (100 ft) radius from the lamp.
Despite being a light source, and thus an active component, the buff created by the lantern will continue to be given even when the light has been switched off.
The Heart Lantern does stack with the Campfire Buff.
When the player has the Heart Lantern Healing Buff, the Nurse will try to remove it for 7 and 50 , as if the player is actually afflicted by a Debuff.