VELUX Sun Tunnels (Solatubes) are great for brightening dark spaces and the domed units offer the most cost-effective solutions. However, sometimes domed units are simply not a good solution. That’s where the VELUX TLR Flat Glass Sun Tunnels fit the bill. These units use the same Sun Tunnel tubing, but the roof part is flat glass! These units are perfect for front of house installations! A repeat customer contacted us for help adding light to her family room located in the front of her home. New skylights were not cost-effective, so we opted for the installation of TLR Units and boy what a difference in that room!