據(jù)NEMA協(xié)會數(shù)據(jù)顯示：白熾燈指數(shù)在2008第一季度增加了0.7%，結(jié)束以2007第二季度開始的一連串下降。盡管有稍適的季度增長，指數(shù)在兩年基礎(chǔ)上還是下降了24.5%。雖然白熾燈的裝運從2004年起就開始平穩(wěn)下降，但從指數(shù)看，在2007年仍下降了18.6%。 相反的，CFL（節(jié)能燈）的指數(shù)與去年同期相比，增長33%。而且，從2004年起，指數(shù)增長五個幅度。隨著2002年的大批量裝運，部分是因為加利福尼亞的能源危機引起的，包括2005年在內(nèi)，CFL運送指數(shù)每年平均為66％。然而，在2006年和2007年增長率分別增長了112.6％，138.6％。這些行業(yè)趨勢有可能繼續(xù)，即使是在美國當前減緩的經(jīng)濟發(fā)展情況下。然而，隨著消費者使用CFL燈取代傳統(tǒng)白熾燈的使用率增長，指數(shù)會繼續(xù)增長。 [FONT=times] original text [/FONT] [font=times][Color=#708090]NEMA’s Incandescent Lamp Index increased 0.7 percent for the first quarter of 2008, ending a spate of declines beginning in the second quarter of 2007. Despite the modest quarterly increase, the index fell 24.5 percent on a year-over-year basis. Although shipments of incandescent lamps have declined steadily since 2004, the index showed the largest annual decline to date, dropping 18.6 percent in calendar year 2007. Conversely, the index for compact fluorescent lamp （CFL） shipments grew by 33 percent compared to the same period last year. Moreover, the index has grown by a magnitude of five since 2004. Following a surge in shipments during 2002, partly brought on by the energy crisis in California, growth in the CFL shipments index averaged 66 percent per year through 2005. However, the growth rate of the index soared in 2006 and 2007 increasing by 112.6 and 138.6 percent, respectively. These industry trends are likely to continue, albeit at a more tepid pace given the current slowdown in the U.S. economy. Nevertheless, the divergence of the indices will continue to grow as consumers increasingly substitute CFLs for traditional A-Line incandescent lamps.[/color][/font]