The empty candle lantern can be filled with a white candle or black candle to make a candle lantern. It can then be lit to use as a light source in dark areas. Lighting the candle lantern requires a tinderbox and level 4 Firemaking. No experience is received when lighting a candle lantern.
Candle lanterns are recommended for the Lumbridge Swamp Caves, as they have a lower chance of igniting the swamp gas, which will cause an explosion and damage the player. However, a better alternative is a bullseye lantern, and if that is not available then an oil lantern will suffice.