[Facts] Lucifer, Superstar
As you said, the name "Lucifer" does mean "bearer of light", but I believe the use of this name in the Book of Isaiah was a reference not to "light" as in the sense of "enlightenment", but rather to the actual physical light borne by the Morning Star -- the planet Venus, one of the brightest celestial objects often seen at dawn. The actual Hebrew word originally used for Lucifer in the book of Isaiah is "Heylel" (which, btw, makes a great Satanic name). It was the Greek Septuagint Bible which translated this word "Heylel" (meaning brightness, morning star) into the "Eosforos" you mentioned (literally meaning "bringer of the morning", I believe), and then "Eosforos" was translated to "Lucifer" ("bringer of light") in the Latin Vulgate Bible. Personally, I prefer that the name of Lucifer be associated with the bringing of enlightenment to mankind, but I don't believe this was the intention of the people who originally penned the Bible -- who viewed Lucifer as the bright "star" of his time who fell from grace through an excess of pride.
Interestingly, Jesus is also referred to as "The Morning Star" in the Book of Revelations, thus supporting the pagan contention of how early Christianity actively set out to displace the old gods in the collective consciousness of the common folk.
-- Nanaea
Gotta get started on my holiday Saturnalia shopping...