Annually, lighting accounts for 15% of global electricity consumption and 5% of worldwide greenhouse-gas emissions. In the USA alone, the transition to solid-state lighting has already reduced lighting-related energy needs and greenhouse-gas emissions by about 25% with respect to non-solid-state lighting (SSL). However, the average household energy consumption for lighting is set to triple over the next 50 years due to population growth and an increase in housing size...
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