Does Lucifer mean good or bad? What about Satan?

Lucifer turned out to be an archangel, but later he defected. After failure, he became a degenerate angel and went to hell as the head of the seven kings. The just are angels, and vice versa. Thus, Lucifer became a demon. The devil of Satan, or the head of the seven kings of hell, is generally Lucifer. I think Lucifer is an angel and fallen angels, but some people think he is a devil. Different people have different opinions, and opinions cannot be unified.