programs. Chief among these is the U.S. EPA's Green Lights and its successor ENERGY STAR(R). Using four decades of data related to fluorescent lighting ballasts, this study isolates product price effects and thereby permits the impacts of public programs to be distinguished from the typical workings of the market. The economic indicators are further used for deriving market volume estimates that are converted to energy savings and climate protection impacts. The findings reveal that Green Lights is responsible for annual savings in 2000 of over 5.6 million metric tons of carbon. INTRODUCTION Irrespective of whether or not energy efficient products, such as electronic fluorescent lighting ballasts, are promoted by public programs, it might be expected that after their introduction into the market their prices would fall relative to the products they are intended to replace. It is well documented that a typical new product is introduced at a relatively high price with sales at low volumes. Soon, aggregate production, improvements in manufacturing techniques, labor