Skull Lamp

The skull lamp is a decorative building and light source that was added in update v0.15 of The Forest.

Gameplay
A skull lamp is very useful for improving the player's view at night since they (unlike fires) do not need to be re-lit. They are popular to place for lighted pathways around the player's base. They can also be placed in caves as a way to light up a cave. There is often a lot of skulls in caves which may be on purpose by the developers to encourage players to place skull lamps in side caves. Keep in mind that placing lots of these in a cave may affect performance of your game. Though this depends of whether the game loads the cave system and above ground system at the same time.

Building
If the skull lamp isn't suitable, the player can also build these other light sources providing that have ceilings/roofs to attach too: