There was a Jewish Rabbi living in Paris during the time of St Louis. His name was Jachiel and he was a great manufacturer of prodigies. The Jews held him as one of their saints, and the Parisians as a sorcerer. He worked by the light of a magical lamp at night whilst everyone slept, and it illuminated his chamber as brightly as if it were day. The lam never needed to be replenished with oil, and soon rumours spread about where it came from.
Those who knocked at the door during the night noticed that various colours flew from the lamp, and it would fail if they continued to knock. The, Hachiel would turn a screw in his table to administer a small shock to the visitor.
The Rosicrucians were also believed to have contact with magical lamps of this nature, and when the tomb of Cicero's daughter was opened several were said to have been burning within it.