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NEMA’s Lighting Systems Index has shown a positive performance in the first half of 2012, as it gained 2.9 percent on a quarter-to-quarter basis from the first to second quarters of 2012. On a year-over-year basis the index increased by 6.6 percent, indicating that aggregate lighting equipment demand has improved appreciably since the recovery began; however it remains well below the levels observed during the previous economic expansion. All five categories of lighting systems products included in the index registered solid gains compared to the second quarter of 2011.