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newreef06 · 01/30/2010, 03:02 PM

I have a question about MH bulbs. How long do the bulbs last. I keep my lights on 8 hrs a day. Also I had my bulbs since nov 08. So about a 1yr and 3 months. I notice I have gotten alot of brown algea over the last few months. Do they need to be changed???

01/30/2010, 03:02 PM	#1
newreef06 Registered Member Join Date: Mar 2006 Location: Western Ma Posts: 822	MH bulbs how long do they last I have a question about MH bulbs. How long do the bulbs last. I keep my lights on 8 hrs a day. Also I had my bulbs since nov 08. So about a 1yr and 3 months. I notice I have gotten alot of brown algea over the last few months. Do they need to be changed???