science · 01 January 2014 · 10 years ago
In 2014, in the U.S., the manufacture and importing of the common 40-watt and 60-watt general service incandescent lamps was ended under the deadline specified in the Energy Independence and Security Act of 2007. It required better energy efficiency, so that they would be replaced by compact fluorecent, halogen or LED lamps producing more lumens of light per watt of consumption. A modern 43-watt lamp produces the brightness of an old style 60-watt incandescent lamp. Its higher initial purchase price will be more than be paid for in electricity cost savings over a much longer lifetime. Some incandescent types remain exempted, such as appliance, rough service, three-way, candelabra, showcase and other specialty types. The 100-watt incandescent lamp was phased out in 2012, and 75-watt in 2013.
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