IES RP-2-20

This document is a revision of IES RP-2-17, published in 2017. It includes information on current lighting techniques and new lighting technology introduced since that date. This document was written for designers with varying levels of experience in retail lighting design. It emphasizes lighting quality and energy efficiency and provides an in-depth discussion of the lighting system and the criteria essential to lighting merchandise displays in a variety of retail applications. As such, it is intended to serve as a foundation for good retail and merchandise lighting. It provides recommendations for both horizontal and vertical illuminance levels as well as uniformity recommendations.