??????????????The NEMA Lamp Indices are composite measures of NEMA member companies’ U.S. shipments of a variety of lamp types, including compact fluorescent, fluorescent, halogen, high intensity discharge, and incandescent, and is designed to track underlying demand for these types of lamps. Product shipments data are drawn from NEMA statistical surveys conducted regularly by NEMA and are adjusted for regularly recurring seasonal fluctuations.
For more information,
e-mail NEMA's Lamp Indices.