Each of these radial calendars represent one year of building energy use for a few different buildings that Lake Flato has studied in the past few years. Each dot represents one hour of energy use, with a larger dot indicating more energy used. The color of each dot represents the outside temperature, from 40°F in blue, to 90°F in red. Midnight is on the inside of the circle, with 11 pm on the outside. Lake Flato monitors the energy use of several buildings as a means to learn more about how energy is actually used after a house or building is occupied. The energy use is often radically...