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Old 01-24-2013, 03:10 PM   #16
Rush3737
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Another quick question about this lighting.

I know that WPG is now obsolete, but 2-3 WPG was a rough guide for planted tanks as far as I could tell. Two of those bulbs would give me 64 watts to 55 gallons. What is it about the bulb/fixture that allows it to provide enough usable light to the plants?
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