Lantern

Glowstones are stones that glow in orange. These are mostly carried by scavengers, and almost all scavengers carry them in dark areas. Glowstones cannot be thrown as weapons, but can function as a distraction when escaping enemies. Glowstones are extremely useful traversing dark regions such as Shaded Citadel and Filtration System, and are necessary to platform in dark areas at the beginning of the game.

Trivia

 * Glowstones generate the same radius of light as having eaten Neuron Flies, making it an effective substitute at the cost of an inventory slot.
 * Glowstones generate even more light than the Lantern Mice without the movement restriction, making the stone a superior portable light source.