NEMA's shipment index for incandescent lamps increased for the second consecutive quarter in Q2 2011, showing an improvement of 5.6% per over the same period last year. Conversely, the index for CFLs declined for the fifth consecutive quarter. Moreover, the rate of decline in the shipments index accelerated to 18.5 % on a year-over-year basis (y/y) versus 16.8 % y/y and 8.7% y/y during Q1 2011 and Q4 2010, respectively.
The incandescent lamp share of 80% 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%. 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.