A customer said that there was another supplier of LED grow lights which PPE was very high, but the price was very cheap. He could even provide a report on the actual measurement of the integrating sphere. Will it really be as good and cheap as he believes it?
We choose a 640W LED grow light and put it into this 2-meter diameter integrating sphere.
We set the absorption coefficients of the integrating sphere to 1.5, 2, 2.5, and the resulting umol/j are 1.81, 1.83, and 3.02 respectively. At present, the lights similar to Fluence, 2.7umol/j, is already the top PPE in the industry.
So what kind of test is accurate?
It is necessary to put it in the small black room for testing.
For customers, it is impossible to set a small dark room because of the high price. Luis recommends using PAR Meter to measure PPFD, 50 USD. For grow lights of different brands and similar shapes at the same power and height, measure the PPFD at different positions, and then compare the highest value, average value, and uniformity.