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Old 04-17-2013, 02:50 PM   #521
mistergreen
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Default DIY PAR meter, Yeah you heard me

I match reading again a spiral cf ranging from 160 - 50 par by varying distance.

Your 1300 par reading sounds right. The par is calibrated for indoor light. It's the beginning of spring. You should get 1800-2000 at noon around July, remember the earth is on an axis.


I'll try a different light source next round just to make sure. I have a feeling it's slightly high but x2 or x3 is too much. Again, if you feel it's too much, change the pot to your liking.

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