What length can the tube be?

To achieve optimal light output in spaces that require long tube runs, we recommend using tube lengths no longer than those listed below:

• Solatube® Brighten Up® Series: Solatube 160 DS (10 in. / 250 mm) – 20 ft (6m)
• Solatube Brighten Up Series: Solatube 290 DS (14 in. / 350 mm) – 30 ft (9m)