​NEMA’s linear fluorescent lamp shipment indexes for 2015Q1 continued the downward trend exhibited during calendar year 2014.  As expected, due to energy efficiency regulations the index for T12 lamps declined for the fifth consecutive quarter on a year-over-year (y/y) basis, dropping by 39.5 percent. T8 shipments also posted a double digit decline, decreasing by 21.7 percent. Shipments of T5 lamps fell more modestly registering a year-over-year decrease of 14.8 percent.

Seasonally adjusted shipments of T5 lamps garnered a modest increase of 0.1 percentage points to reach a share of 11.2 percent, an all-time high watermark for the series. The market share for T8 lamps posted the largest gain, increasing by 2.4 percentage points to a share of 72.8 percent. T12 lamps slipped to a share of 15.9 percent for 2015Q1.