qui parla delle ore di luce in rapporto ai par. come puoi vedere con piu PAR in linea teorica si possono ridurre i tempi di esposizione.
http://www.advancedaquarist.com/2009/5/aafeature
qui invece parla di quantita' di luce..
http://www.advancedaquarist.com/2004/7/aafeature
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Q: Anyone Thinking of Dumping LEDS and going back to Halides or T5???I'm think so much it!! 
A: I don't think you are crazy and your experience is becoming the norm.
(reefcentral)
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