Lighting Industry

Mercury Vapor Lamps Continue Their Decline

Craig DiLouie February 7, 2012

NEMA’s shipment index for sodium vapor high intensity discharge (HID) lamps increased 7.1% and 2% on a quarterly and year-over-year basis, respectively, during Q3 2011.

However, metal halide lamps decreased by 5.3% from the previous quarter. The index for mercury vapor lamps decreased too, falling by 0.6%, erasing gains during the previous quarter. Moreover, the mercury vapor index posted a double-digit decline of 19.4% on a year-over-year basis.

Variations in market share were concentrated in sodium vapor and metal halide lamps. Sodium vapor lamps increased by 2.7% to 34.4%, while the market share of metal halide lamps decreased to 60.9 percent. The market share of sodium vapor lamps remained unchanged at 4.7 percent.

HID index

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