The answer to 'difference between skylight' is that skylights and roof windows are both types of roof openings that let in natural light, but they have some key differences in their design, installation, and use cases. Skylights are typically dome-shaped or flat glass or plastic panels installed directly into the roof, while roof windows are vertically installed and can be opened to provide ventilation.
Skylights are generally better for bringing in overhead light and brightening up interior spaces, while roof windows are more versatile and can be opened to let in fresh air. Skylights tend to be less expensive to install, but roof windows may offer more energy efficiency and customization options. The best choice depends on your home's architecture, lighting needs, and personal preferences.