The old saying that natural light is best has never been more true than it is today. Natural light not only adds to the ambiance inside a home but also energy savings because it is free.
Natural light that flows in from windows, skylights utilizes the free energy that comes from the sun and can reduce energy costs substantially. Of course, having these openings also be energy efficient and tight from drafts is also important. What you gain in light can be eaten up in heating costs if equal attention is not paid to keeping out the cold. Today, thankfully, most new windows being manufactured do have energy savings and efficiency in mind.