Considering a skylight to brighten up room but unsure where to place, if it is worth it, especially considering cost. The rest of the room, to the left of photo, is the dining room and kitchen, which is the darkest area despite, window, patio door. There is a second floor above those, so can't put in any skylights/sun tunnels there, thereby leaving the living room. There is a skylight in the entrance way to the living room. Thanks for any help you can give.