NEMA’s indexes for high intensity discharge (HID) lamp shipments declined for the second consecutive quarter in 2012Q3. Sodium vapor lamp shipments decreased 14.8% year-over-year (y/y) during the quarter, following a loss of 6.8% during the previous three month period. Shipments of metal halide lamps fell 6.9% and 4.9%, respectively, in Q3 and Q2. Mercury vapor [...]