Dying Lights are spectral blue flames in Ghost of a Tale. They appear in the catacombs of Dwindling Heights Keep. They do not emit any heat, but are virtually eternal, as they cannot be put out by normal means. Because of this, pirates often use them as fixtures on their ships to withstand storms.
Tilo can obtain a small Dying Light to use as a lantern after completing Heroes All. It does not require fuel.