The simple way to bring daylight into dark or windowless areas, Solatube ceiling diffusers are highly efficient at diffusing the bright light transferred through the tubing. There are no visible fixings. Choose from three attractive diffuser options: OptiView™, Standard for all models. Gives a spectacular clear view; Prismatic, optional on 250 and 350mm Solatube models and Frosted optional on 250 and 350mm Solatube models.