The second type of skylight is a tubular device marketed under generic and brand of names including Solatube®, Sun Tunnel, sun or solar tubes. Tubular skylights are just what the name implies - a narrow reflective metal tube which conveys natural light from a small dome on the roof to a lens or diffuser on the ceiling of an interior space. The dome shape allows light to be collected from all directions and thus maximizes the amount of light at all hours of the day. Full disclosure; I have a tubular...