According the DOE's "Revolution Now 2016" study, LED installations saved $2.8 billion in energy costs in 2015 and prevented 13.8 million metric tons of CO2 emissions. By 2035, the DOE estimates that LEDs could account for over 85% of American lighting installations and drive a 75% reduction in annual lighting energy consumption by that time versus a scenario without LEDs, resulting in total annual energy savings nearly equivalent to the energy consumed by 45 million U.S. homes. Furthermore, the cumulative savings from 2015 through 2035 would save nearly $630 billion in avoided energy costs along with very significant emissions reductions from avoided electricity generation.