Agreed, Jesus always was, and always will be, the true Light. I did a little research about the "light from light" phrase in the Nicean Creed. Here is what I found:
"It was at the Councils of Nicea and Constantinople that the true nature of Jesus was defended against a multitude of heresies. In particular, the words “God from God” and “Light from Light” were aimed against the Arian heresy, which denied the pre-existence of Christ. Arius (c. 250-336), a priest from Alexandria, argued that the Father alone is God in the full sense and that the Son was a being created by the Father. This idea was also called “subordinationism.” The Councils, drawing upon the traditions handed down to them from the Apostles, condemned the heresy and declared that Jesus was indeed both true God and true man. Against Arius, the Nicene Creed reasserts the principle that Jesus Christ is not made by God and so is of the created order, but is instead of the same order of being as the Father: uncreated, eternal, and timeless." This explanation does not contradict Scripture.
I agree that claiming that Scripture teaches something that it clearly does not is blasphemy. On the other hand, applying different interpretations of Scripture generally only happen with secondary issues. Scripture is very clear about foundational issues, and less clear on other doctrines.
We seem to be at odds over "begotten". I take that to refer to His incarnation when He was born to the Virgin Mary. Do you see this differently?