This is an example of a Christian lamp, dated to the 6th/7th centuries CE. During the time of the Byzantine Empire, these lamps were common and mass-produced. These lamps were decorated with the phrase, “the light of Christ shines for all.” This lamp is different. The letters are irregularly inverted and illegible characters are inserted in places. The creator of the mold for this lamp seems to have worked from a common model of the popular phrase, but with little to no knowledge of Greek, the person created a unique lamp merely echoing the original.
In fact, the only words that remain legible are “light,” and “Christ.”