We are having the ceiling replaced in our bedroom. Before they put up the new drywall, we'd like to add some 4" recessed lighting. Our bedroom is 15X17. There are two large windows on two walls, a fireplace and closet on another wall and the bed is against a blank wall. It's on the west side of the house so we get plenty of evening light but no morning light. We don't read in there or anything, but we just need more light other than the ceiling fan and lamps. How many do you think we need? Should we just put one in each corner? Thanks!