The Heart Lantern is a unique variant of lantern, a hanging furniture item, that emits moderate light while also providing the Heart Lamphealth regenerationbuff. It must be hung from the underside of blocks, like other lanterns. The Heart Lantern is also a mechanism that can be toggled if wired. Toggling it off will only deactivate the light source, not the buff.
The Heart Lamp buff provides nearby players with a constant 1 health-per-second. The buff applies to any players standing within a rectangular area of 170×125 () / 100×84 () tiles centered on the Heart Lantern, providing a boost in health regeneration similar to the one granted by Campfires. The regeneration buffs from both items will stack together to provide a greater regeneration boost, and being within range of these items can also help to counteract the effects of damaging debuffs (such as Poisoned and On Fire!).