The University has been successful in limiting year-to-year consumption growth with aggressive HVAC controls and lighting retrofits. Additional lighting retrofits are planned for the campus; they include lower wattage lamps, occupancy sensors, and LED emergency lighting, among other features. The University is currently benefiting from the state of Maryland’s requirement that retail electric suppliers meet a minimum renewable energy portfolio standard of 3.5 percent for 2006 and 2007, increasing to 4.5 percent in 2008 and 5.5 percent in 2009. Additionally, the University increased the percentage of renewable energy supply for its Type I accounts (below 60 kilowatts) to a total of 5 percent starting in June 2007.