After measuring PAR values under different light conditions, we compared the multispeQ to LiCor's light meter. The values were similar, and a linear regression showed slopes ranging from 1.1 (sunny conditions) to 0.97 (under plant canopy).

Graph of LiCor values plotted against multispeQ PAR

Upon further testing, we found that red light had similar measurements between the multispeQ and LiCor light meter, while blue light values were different by a factor of 3.

Graph of LiCor values plotted against multispeQ PAR Under Red and Blue Light