It is assumed that the level of lighting intensity (lumens per square foot) in buildings remains constant over the analysis period (2013– 2030). This simplification because it requires LEDs match the source lumen output levels of conventional sources in all applications. However, many spaces may be over-lit and LED technology may be able to achieve adequate illumination with fewer lumens (e.g., due to improved uniformity, directionality, and/or color performance).