testout8.wav is in shade on sunny day with most of sky blocked, so it is 8 PAR
with calibration constants of -450, 25 110 measured 0


testout85.wav is in shade with about half of sky blocked, so par is 85.
110 measured 14


testout157.wav is in shade on sunny day with most of sky not blocked, so 157 PAR
110 measured 142


testout1922.wav is full sun on sunny day with 1922 PAR
110 measured 1872


with calibration constants of -1, 25
110 par turns on at about 29 par (300W lamp) and 27 par (projector lamp at 12.00V)