Natural Light, Tubular Skylight Kit, Flat, White Diffuser, 13 inch Illuminates up to 300 sq. ft. - Equivalent of up to 500 watts depending on installation. ENERGY STAR Qualified - May Qualify for Tax Credits. Hurricane Tested/Approved - High-Impact Acrylic Dome. Industry Leading 25 Year Manufacturer's Product Warranty. 13" Model with Flat Roof Flashing for Asphalt Type Roofer Installs.