Light Bulb

A Light Bulb is the glowing top of a Light Flower that has been picked. It can be used to build and later fuel a Lantern. Light Bulbs can also be eaten for 1 Health.

Light bulbs can also be placed on the ground and will make a Light source big enough so you won't be attacked by the Grue (Example Picture Below)

Since Light bulbs spoil quickly, only grow underground, and give off light even when left alone, it's best to leave Light Flowers unpicked until you need to quickly refill your lantern while exploring.