How do I play this exactly? Sanity/Light and Darkness - please explain

[CrushedRaiD]

Well, my tactic on the game was that i was always at the corners of the room, used the tinderboxes only in places where i have to go more than once or just pass by.. Just try to stay near windows (if possible) and use the lantern at places where there are not that many candles or torches.. You will find lots of tinderboxes later in the game so just use them