Edmund's lie about being in Narnia came to "light" because of it. He mentioned that they were going in the wrong direction to reach the lamppost and then Peter and Susan realize that he had been there.

Pattertwig: brilliant! This is a perfect example of what I said earlier in this thread, namely that the Word is a mirror of the soul [James 1:22-25], just like light. I then quoted Ephesians 5 "But all things that are reproved are made manifest by the light, for whatsoever doth make manifest is light." This is what the lamppost, which I think symbolizes truth [for us, the Word and Christ], does to Edmund. Because of the light, he and his lie can't hide anymore.

I think it also signifies hope in a time of darkness. Like when it was winter in LWW.

Good point! Before Christ, it seemed like a time of darkness. Before Christ, it was spiritually winter. But God's people still had hope. What was it? The Messiah promised in the Scriptures, the true light.

jesusiskingofkings: ditto on all of it. I really liked your character analyses.

Notice in the in the book the Last Battle, everything that was good in the old Narnia is in the new Narnia except the lamppost.

I was thinking, maybe this alludes to the fact that in the bible, it says that there will be no sun in the new heavan for God will everyone's light. If the lampost represents light, then in the new Narnia, it would not be needed for Aslan (spiritual light as Christ is) would be there.