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Old 06-03-2006, 11:13 AM   #1
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Lighting question

I have a Lighting hood with 3-250w MH and 2-96w actinic Flour. bulbs.
Two questions:
How many hours of use before these type bulbs should be replaced?
How high above the tank (210 Gallon 72x24x29in) should this hood be set? I currently have it sitting directly on the top of the tank and I don't know if that's appropriate.
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Old 06-03-2006, 11:48 AM   #2
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CF bulbs loose spectum after 8-9 months and should be replaced then. MH can go 12-15 months before they need changing.
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