A research project that comprised the design, implementation, monitoring, and evaluation of a conversion to energy-efficient lighting in a retail store is described. Lighting design proposals for two sections of a large furniture store in Syracuse, NY, were approved in November 1992 and installation was completed in February 1993. Monitoring commenced at that time and included measurements of
... [Show full abstract] illuminance distributions, energy use, and installation and operating costs; as well as surveys to measure the influence of relighting on sales and on the attitudes of both customers and staff. Monitoring was completed in July 1993, and analysis and evaluation of the results was completed 2 mos later. This paper describes the lighting design philosophy and discusses in depth the procedures for comprehensive monitoring of a range of influences attributable to retail lighting. Illuminance measures employed in this project included horizontal, scalar, and vector values. Energy measures included power densities and system efficacies. The gathering and processing of data for estimating lighting costs is discussed, as well as procedures for isolating the influence of lighting on sales. Procedures for customer and staff attitude surveys, and factors that influence their reliability, are reviewed. Findings are reported indicating positive effects of the new lighting on sales, customer and staff attitudes, and energy efficiency.