Comment by orcasushi

I would like to add: Increases range for sending and receiving communication via air.

This in addition the the already mentioned: - greater field of sight (eye of Sauron) - greater range of fire - symbolic (to heaven) - status symbol - defense against enemy

I remember this scene from movie 3 lotr where the 2 wizards communicate to each other to invade, by shooting beams from their towers.