The Planted Tank Forum - View Single Post - DIY PAR meter, Yeah you heard me
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Old 11-11-2010, 05:55 PM   #40
mistergreen
No more Bow ties
 
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I called up Hamamatsu, wow what a hassle. I think they'll do a background check hah...

And I had to order at least $50 worth. I think I might wind up with 15 diodes so I'll have plenty to share.
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