Calgary Skylights installed a tubular skylight in our upstairs hallway. It really added a lot of light to the upstairs. I was very impressed by how Steve took the time to explain all my options and the difference between the skylights home depot sells, and the ones they use on their own store (installed by Calgary Skylights!) the typical stuff in the big box stores is not designed for winter cold climates, but for mid western USA. His skylights are insulated, never leak, and come with a 20 year warranty. Whats more the company has been around over 15 years and stands behind their work.