NEMA’s high intensity discharge (HID) lamp shipment indexes declined for the second consecutive year during 2012. Mercury vapor lamps declined 9.6 percent to an index value of 44 signifying that shipments during 2012 were 44 percent of the 2006 base level. The index for sodium vapor lamp shipments fell 6.2 percent, landing at 75. Metal halide lamps posted an index reading of 80, declining by 4.9 percent for the year.
The relative market shares for each HID lamp type were essentially unchanged with respect to the previous year. Metal halide lamps garnered the largest share with 63.5 percent. Sodium vapor lamps had a share of 32.5 percent followed by mercury vapor lamps with a 4.0 percent share for 2012.
NEMA is the association of electrical equipment and medical imaging manufacturers, founded in 1926 and headquartered in Arlington, Virginia. Its member companies manufacture a diverse set of products including power transmission and distribution equipment, lighting systems, factory automation and control systems, and medical diagnostic imaging systems. Worldwide annual sales of NEMA-scope products exceed $120 billion.
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