Since 1955, Columbia Manufacturing Co. Ltd., the leading Canadian skylight manufacturer, has produced products of the highest quality, designed to meet the challenging demands of our climate. Our product line is innovative, and utilizes industry leading materials. Our gold standard warranty supports our product line, and it has withstood the test of time. Columbia has been building skylights that you can count on, for over 65 years.Sun tubes are a great source of natural light where regular skylights cannot be installed. They are perfect for hallways, laundry rooms, kitchens, walk-in closets and bathrooms.