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#16
02-20-2015, 02:42 AM
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The Watts/Gallon rule is obsolete, it is just a guideline but might not be accurate. The Ballast/Bulb/Reflector combination plays a vital role on the light directed to your corals.
If you can borrow a PAR/PUR meter, (at least PAR meter is very accessible these days). That's how you can exactly tell wether your light is enough for specific corals. 
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