Definitions for "UPD"
Keywords:  lpd, metric, watts, linear, illuminate
Unit Power Density. A measure of efficiency commonly applied as a means to evaluate the electrical power consumed by the rated lamp input power of a lighting system intending to illuminate a specific area. This metric is commonly expressed as watts per square or linear foot. UPD is the same as lighting power density (LPD) used in some energy codes and standards.
University Paid Disability benefits.
Keywords:  user, performance, data, refers
Refers to User Performance Data.