Also known as tube lighting, tunnels, or tubular skylights, sun tubes provide many of the same benefits as skylights, but with better heat insulation and greater flexibility for indoor use. Tube lights are especially bright additions in rooms where the natural light from windows or skylights is minimal. The technology captures natural light through a reflective dome on a roof, then transfers it back through a tube to illuminate a dark room. When installing, take time to pick a path from the roof to the ceiling where you won’t hit wires, plumbing, heating ducts, or other obstacles.