DOE Report Shows Shift to Energy-Saving Lighting Products
February 8, 2012
DOE released on January 24 a report showing that the adoption of energy-efficient lighting products in the United States has increased over the last decade. The 2010 U.S. Lighting Market Characterization report examines the current conditions and broad trends in the U.S. lighting market, broken down by technology and sector. The study shows that in 2010, lighting used approximately 700 terawatt-hours (TWh), or nearly 19% of the electricity produced in the United States. Of the total energy used for lighting, the commercial sector consumed nearly half, or 349 TWh, primarily with fluorescent lighting products. While nearly 6 billion light bulbs are installed in the residential sector compared to approximately 2 billion lamps in the commercial buildings sector, the mostly incandescent residential lamps were not used nearly as much per day, on average, as lights in the commercial sector were used. Also, the average system efficacy (a measure of the amount of light provided per watt of power consumed) of installed lighting increased from 45 lumens per watt in 2001 to 58 lumens per watt in 2010, due mainly to a move from incandescent to compact fluorescent lamps in the residential sector, and from T12 to more-efficient T8 and T5 fluorescent lamps in the commercial and industrial sectors.
The new report updates a similar DOE model of the 2001 U.S. lighting market inventory. During the intervening decade, two trends emerged. First, there is push toward energy-saving lighting. Second, there is a continued increase in the demand for lighting, with most of the growth occurring in the residential sector, primarily because of an increase in the number of households, which increased from under 107 million in 2001 to more than 113 million in 2010. See the DOE Progress Alert and the technical reports listed on the Solid-State Lighting website.