Lighting accounts for 20 to 25 percent of the electricity used annually in the United States. Lighting for industry, stores, offices, and warehouses represents from 80 to 90 percent of total lighting electricity use.
If energy-efficient lighting was used everywhere it was profitable, the electricity required for lighting would be cut by 50 percent and aggregate national electricity demand would be reduced by 10 percent. Energy savings would exceed $12 billion a year while decreasing air pollution by five percent. This would be equivalent to taking 15 million cars off the road, resulting in less smog, acid rain and a slowing of global climate change. By the year 2000, the EPA’s target is to increase the Green Lights program to 6,000 participants for a total annual energy savings of 30.5 billion kilowatt-hours. The estimated annual impact of fulfilling this is a 7.5 million metric ton reduction in green house emissions, which is equal to taking over one million cars off U.S. highways or planting over two million acres of trees.