Lamps are a long term source of light. They burn liquid fuel. Lamps retain their fuel content when broken. Using a bucket, Right Click on a lamp to add fuel to it. It can then be lit with a firestarter or anything capable of lighting fires. Olive Oil and Tallow are lamp fuels. Shooting a lit lamp with an arrow can cause a fire.
Multiblock
A lit lamp hanging from a chain.
Lamps are smithed in the Anvil and crafted with Lamp Glass to be completed.
2
One lamp fuel is Olive Oil. The first step in its production is to make olive paste.
You will also need a jute net.
Boil the Olive Paste with Water in a Pot to make Olive Oil Water. Seal that in a Barrel with your Jute Net to produce Olive Oil. Olive oil burns for 8 in-game hours for every unit of fluid.
Another lamp fuel is Tallow. To make it, cook 5 Blubber, in a Pot of water. Tallow burns for less than 2 in-game hours per unit. It can be used to make Candles
Multiblock
Lava will keep burning forever, but can only be held in a Blue Steel lamp.
16
Tier V
Chains are a great way to hang your lamps, and can be smithed in an Anvil.