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#12
07-03-2009, 05:54 AM
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My experience with T5 is too limited so I probably shouldnt say anymore.
This should answer all of your questions about how MH work (plus it saves me valuable typing time). Part V: Everything You Need to Know About Metal Halide Lamps and Ballasts: http://www.reefkeeping.com/issues/2007-03/sj/index.php What temperature does the room your tank is in get to during the summer? If its in a cool basement you may not need anything. If its in a hot apartment with no air conditioning you might have a big problem with heat. A single MH of either wattage should be able to light a 2'x2' area well with a decent reflector.
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"We shall dive down through black abysses... and in that lair of the Deep Ones we shall dwell amidst wonder and glory forever." - H.P. Lovecraft Old 120gal Tank Journal New 225gal Tank Journal May 2010 TOTM The 10th Annual Prince George Reef Tank Tour 
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