Solatube 290 DS Daylighting Systems feature Solatube's patented Raybender 3000 Technology and LightTracker Reflector to deliver an Effective Daylight Capture Surface ( EDCS ) significantly higher than the previous 250mm and 350mm Solatube models. Highly effective and installed by Certified Consultants, this model can transform dark interior applications and light more expansive spaces with multiple units creating a unique architectural effect. It is great for bathrooms, hallways, corridors, utility rooms, dens, home offices, kitchens, dining rooms, and closets.