We decided 5 years ago to add Solatube to our remodel project for our dealership showroom. It is truly amazing the natural light that these products bring and how that natural lighting brings out the shine on our showroom cars. Customers often think these are lights and when we inform them this is from natural sun light they are completely blown away. We added a feature to our electric lighting that allows the lights to turn on when dark or extremely overcast...more often then not the Solatubes are providing ample light and the electric lights stay off! The combination of Solatubes and insulation has saved our company $500 a month in energy costs. I would strongly recommend this for anyone looking to cross over into energy conservation and become more GREEN!!