The Planted Tank Forum - View Single Post - DIY PAR meter, Yeah you heard me
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Old 01-20-2013, 08:45 AM   #475
Whitebeam
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Superb - my thanks.

I just want to take relative readings between my current T5s and my new multi-chip leds, once I've assembled them, so I won't need to worry too much about calibration.

Peter
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