History of the lucerne
From Roman times until the light bulb was discovered by Edison at the end of the 18th century, the only way to get artificial light was with skylights or old Roman lamps or candles. The Lucerna is a small utensil, made of terracotta or ceramics, as seen in the photo, connected to a wick. Lucerne is fed with oil, normally it was fed with lampante olive oil, hence its name, lamp.
This lampante olive oil is the olive oil that could not be consumed because of its enormous defects, so it was used to feed the skylights and thus get artificial light. Currently lampante olive oil is not used for lamps, but is refined and converted into olive oils. The refining process is a more or less long process, depending on the bad state of the oil, which subjects the oil to physical and chemical processes, eliminating both defects and minor components, which are so beneficial to health.