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For Replacement Lamps, LEDs are Different by Vrinda Bhandarkar

Many energy efficiency programs have been promoting CFLs to reduce energy use. Rebates and discounts by major retail outlets have dramatically increased shipments of CFLs in the US — from 5% of the total lamps bought in 2004 to 23% in 2007. The US EPA estimates that Energy Star CFL sales for 2007 were nearly double those in 2006. However, gains in efficient lighting have been fragile in the US. Sales of CFLs have dropped in the current recession to 21% of total US consumer light-bulb sales in 2008 from 23% in 2007, according to the US DOE chart.  There are many possible reasons for this decline in the market share of CFLs. New users have not been added to the market as disposable incomes have declined and customers are sensitive to higher prices. Early adopters bought the long-lasting CFLs and the rest of the market has not followed suit. Color quality issues of CFL persist and cannot be overcome with incentives. Fear of mercury in CFLs has not been adequately addressed.  In spite of heavy investment in promoting CFLs, incandescent technology has proved difficult to unseat, especially in the residential segment. The LED lighting industry has continued to grow in spite of the economic downturn.  http://www.ledsmagazine.com/features/6/12/3

 CFL Market Share