In 2017, the U.S. Department of Energy (DoE) evaluated the performance of a selection of LED lighting products with very high published efficacies close to or topping 200 lumens/W. All seven were industrial luminaires, with all but one featuring unshielded light emitters. DoE set out to validate the efficacy claims, characterize commonalities between the products, and identify any performance tradeoffs. Pairs of product samples for each of the seven luminaires were tested for horizontal light level, flicker, and maximum luminance (photometric brightness). Further, 23 knowledgeable observers visually evaluated the products in a mockup.