DOE has published the first in a series of four special investigations intended to extend the findings of CALiPER Application Summary Report 20: LED PAR38 Lamps, which was published late last year. The new report, CALiPER Report 20.1: Subjective Evaluation of Beam Quality, Shadow Quality, and Color Quality for LED PAR38 Lamps, focuses on a subset of the lamps from Report 20, which were separately assessed by members of the Illuminating Engineering Society of North America.