How much energy can be saved with solid-state lighting? How much will these energy savings reduce CO2 emissions?
A little over one-third of all primary energy is used for generation of electricity, and a little over one-fifth of all electricity is used for lighting. Hence, around one-fifteenth of all energy is used for lighting in the United States. Doubling the average luminous efficacy of white lighting through the use of solid-state lighting would potentially: Decrease by 50% the global amount of electricity used for lighting. Decrease by 10% the total global consumption of electricity (projected to be about 1.8 TW-hr/year, or $120B/year, by the year 2025). Free over 250 GW of electric generating capacity for other uses, saving about $100B in construction costs. Reduce projected 2025 global carbon emissions by about 300 Mtons/year.
