This week Minnesota Public Radio released a report describing how real estate company Madison Equities is overhauling three of their large downtown St. Paul buildings. The most visible upgrade will be the replacing the neon lighting on the iconic First National Bank Building with LED lighting. This is part of a comprehensive $12.5 million retrofit project resulting in a 40 percent reduction in energy use between the three properties. And while the end result of this project will mean big savings, it actually started with a small decision – to benchmark how much energy the buildings were using in the first place.