The new generation VELUX sun tunnel has been redesigned from the ground up with a wide range of improvements that make installation faster and easier. Tube assembly time is now cut in half.No need to enter the attic or loft! New roof module with removable sash ensures quick and easy installation from the outside. Drop the light tunnel into place from the roof. There’s no need to enter the attic or loft; the light tube is now easy to install in tight spaces where attic access is not possible.