haha yeah, you are right. I added the last sentence in a hurry, sorry for the typos! :P
So did I get this right: for example "불 켠 사람" means "a person who lit (something) up" , but "불 켜진 사람" means "the person (himself), got lit/burned"?
Thank you very very much for your answer, I have the feeling I understood everything now. You are really good in explaining! :D