NEMA’s shipment index for incandescent lamps increased for the second consecutive quarter in Q2 2011, showing an improvement of 5.6 percent over the same period last year. Conversely, the index for compact fluorescent lamps (CFLs) declined for the fifth consecutive quarter. Moreover, the rate of decline in the shipments index accelerated to 18.5 percent on a year-over-year basis (y/y) versus 16.8 percent y/y and 8.7 percent y/y during Q1 2011 and Q4 2010, respectively.
 
The incandescent lamp share of 80 percent for the combined incandescent-CFL market is the highest reading since Q4 2007. Weakening demand for CFLs drove down its share of the combined CFL-incandescent market to 20 percent. The sales ratio for CFLs decreased to one out of every five lamps from one in four lamps ratio exhibited during the previous two years.