power light gradient (PLG)

A factor used to address the fact that a 50% dimming level on a light does not necessarily correspond to a 50% lamp power output. In Communications Tester, this is expressed as an attribute for the lamp type and calculated as the ratio of change in light level divided by change in power level. The value is likely to vary for each light manufacturer/model. If the value is not known, it is assumed to be 1.