The Lucifer Calaritanus reference article from the English Wikipedia on 24-Apr-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Lucifer Calaritanus

Lucifer Calaritanus (unknown - 371) was bishop of Cagliari, Sardinia, and founder of the Luciferian sect. This sect was attacked by Jerome in Altercatio Luciferiani et orthodoxi.

His date of birth and the history of his youth are not known, but he must have been born early in the fourth century.