Natural light is a source of Yang Qi, preferred in all Yang Rooms - Living Room, Kitchen, Office, Family, Play Rooms. Natural light simulates human Qi, giving vibrancy to the spirit to enter the day with a smile.
in the winter, hallways get so cold, esp with hardwood floors--but curtains keep heat in and make corridors feel cozy! score! I hope I have a house with lots of back hallways at some point. That would be cool.