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I and others on here have posted several photos with PAR values in this thread and the question of credibility has all of a sudden popped up I am doing this testing to simply show the differences amongst the reflectors to help reefkeepers make their own decisions.
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I missed this the first time. It looks like you took offense. Really, none intended. As i noted above, both methods have value and I appreciate the numbers you are posting. I was not questioning personal credibility but tank numbers are going to be inherently more variable than a grid in air. We can argue about the merits or value of one set of measurements but certainly a grid in air is more repeatable.