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post #15 of (permalink) Old 02-15-2013, 02:07 PM
HD Blazingwolf
Planted Tank Guru
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Join Date: May 2011
Location: Chattanooga, TN
Posts: 4,907
i would go with one 54 watt

to affect light levels, u can adjust up or down by hanging the fixture
for instance, my 75 gallon has 6x54 watt bulbs suspended 10 inches above the tank
two are on for 9 hours all six are on for 4 hours
distance spreads the light intensity,
you will have more control with one fixture than having to change multiple fixtures
plus more fixtures, means more bulb costs
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