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Old 06-03-2006, 10:13 AM   #1
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Join Date: May 2006
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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, 10:48 AM   #2
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Location: Savage, MN
Posts: 7,889
CF bulbs loose spectum after 8-9 months and should be replaced then. MH can go 12-15 months before they need changing.
Some people are like slinkies...they serve no real purpose yet can still bring a smile to your face when you push them down the stairs!:p
Have a great day! Brian
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light, lighting

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