These tubular skylights are available in 10- and 14-inch diameters. From an impact-resistant roof dome, with a maximum visible light transmission of 92 percent, daylight travels down a highly reflective aluminum shaft with a silver film, providing over 99 percent total reflectance. At the end of the tubing, daylight is distributed through a die-cut acrylic diffuser. Flush diffusers with a frosted finish, or curved diffusers with a prismatic finish, are available, as well as options and accessories, including a ventilation add-on kit and a Daylight Dimmer. www.solatube.com