The Planted Tank Forum - View Single Post - How often do you change your bulbs?
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Old 02-15-2013, 12:35 PM   #7
HD Blazingwolf
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well are the HO or normal output? at 20 bux a bulb i will replace mine when their lifespan hours have been met
which on two of my bulbs will be about 9 months
and 4 of them being on half the time will be 18 months
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