Alan Walker - The Spectre Lyrics Meaning

He's talking to himself and reflecting on his life. He's stuck in his head and has lost himself, which is what the first stanza means, and wonders if he needs his inner self anymore, not the fake mask he wears on the outside.

The 'home' he mentions about is himself, and he's asking whether or not it's the place where he can find himself again or if he has to look somewhere else. As he can't exactly get an answer to his question, he doesn't know where he's going and walks down an unknown, unpredictable path. He's still living, loves people, and lies by saying he's fine.

In the darkness of his head he claims he doesn't need a light (which represents joy, happiness, love etc.) to guide him because what's left of him is just a ghost of who he used to be, because who he was know only exists on the other side, which is probably the land of the dead or something.

I'm too lazy to do the rest of the song, but the spectre (spectre means ghost in case you didn't know) is him.