having the power outlets in the ceiling is definitely a great idea. the space behind your quilt frame is a great place for your design wall as nothing else will go there anyway.... although i put kitchen cabinets up high on that wall for extra storage... i'm shorter, so it's easy to walk under them. i like fluorescent lights... but you can get the daylight lamps for them for the proper type of lighting. i love your idea of the skylight in the closet.