A skylight is a fixed window set into the roof line. The window itself does not open.
A roof window is a window that actually opens, usually with a pivoting “awning” style mechanism. It may even incorporate window screening.
A tube skylight is normally used for small spaces to provide natural light. It is a simplified form of light shaft in which a small bubble dome window, set into the roof line, is linked to the ceiling by means of a flexible reflective tube.
Adding free sunlight into your Bay Area home or office with window type skylights or tubular skylights gives you both psychologically and physiologically benefits. Sunlight offers the full visible spectrum of light that reduces eye strain and makes our belongings look their true color while blocking out harmful UV rays. Simply, people are just much happier under the sun! It even helps indoor plants thrive.