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Old 01-05-2006, 09:50 PM   #1
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Another lighting question of course

I have a 81 g tank, I am setting up for a reef. Dimension are 53LX24HX14W I am want to use a MH system. I have heard 3-5 watts per gallon is good? what is best for a Reef, optimal?
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Old 01-06-2006, 01:21 AM   #2
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WPG is not a real good measure for a reef tank. A 5ft tank is somewhat different. A MH light normally covers 2ft of area. Most people get 2 MH's for a 4ft tank. I almost bought a 5ft 100 gal and plannined on using my 4ft fixture(2x250 MH + 2x54 T5). I know a guy that uses 2x400MH w/ VHO actinic on a 125 and it looks nice. A 2x250 is about all I can handle on my 75 gal due to the heat it generates.
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*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,
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Old 01-06-2006, 01:22 AM   #3
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5 WPG should cover anything you may want in there, including clams. I have a 120, and I am at 4.67 WPG and my clams are doing fine. I have been told that it's not just the WPG, but how well the light penetrates into the water, which I believe.
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Old 01-06-2006, 07:52 PM   #4
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Quote:
Originally Posted by ellisz
I almost bought a 5ft 100 gal and plannined on using my 4ft fixture(2x250 MH + 2x54 T5). .

SO how does that work you run the MH during the day and the T5 at night. And BTW what is a T5
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Old 01-06-2006, 09:46 PM   #5
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T-5 is 5/8 diameter bulb that is High output Floerscent. A 4 ft. bulb produces 54 watts
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Old 01-06-2006, 09:55 PM   #6
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and you never really run any lights during the night except moon lights, you know to give that nice night time feeling.
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