The Brighten Up Series includes the Solatube 160 DS (10 in/250 mm Daylighting System) and Solatube 290 DS (14 in/350 mm Daylighting System). The Solatube Daylighting System can be installed quickly and easily between standard rafters and joist and without structural modifications. The series also includes optional diffusers and flashings, as well as Light Add-On kit, Daylight Dimmer and Ventilation Add-On kit.