A series of studies evaluated the impact of office electronics on building energy. Work included estimates of market growth and aggregated impact on the electric power system, a technical assessment of opportunities for reduced energy usage, development of test procedures to provide standard measures of equipment energy consumption, and measurements of new equipment that includes power-management features. For lighting, a separate project is evaluating systems for distributing light through buildings with fiber optics or light guides. This system offers the possibility of stripping the heat from large, centralized lamp banks to reduce air-conditioning loads.