We had four Solatubes installed by Capital City Daylighting in early May 2015. Our kitchen has no external windows at all, and our living room windows face north and are shaded by a large tree and the roof over the front porch. Neither room received much natural light. Two 14" tubes in the living room and two 10" tubes in the kitchen fixed that. The installation took a single day and the two gentlemen were very professional and friendly. The results have been outstanding with bright, natural light throughout the day. Also, since then we have been subjected to monsoon rains and high winds several times in late June and July with no leaks or issues. Very satisfied and happy to recommend Solatubes and Capital Cities Daylighting.