We believe in being transparent showing PAR charts of actual “usable PPF
” testing we have done. Each test starts with a warm-up of the lights for 30 minutes, we then use an Apogee MQ-500
quantum meter measured from the top of the sensor (not the floor) for the readings along with mylar walls in our test box. If you have questions on this or how to do this yourself, please contact us we will be happy to assist you.