Hi Rosebud -
You have evidently found all the torches on the wall; that's the hard part for most people. If you have picked up the lighter, and pulled the lever which switches the bars, there should be only one way to go, and it's not hard. I'm guessing you might have pulled the lever twice and returned the bars to their original state. (I'm not sure if that happens; never tested it) but try pulling the lever once more to see if that helps. The lantern, if I recall, is not hard to find and not hard to see.
DO BE SURE to create a saved game after you light the lantern and before you go into the well-room.
That will be ten Dramoi.