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#1
01-23-2008, 08:42 PM
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From what I have read, I plan to change mine around the 10-12 month mark. Totally necessary? Maybe not, but you will get the most from the lights that way I figure. Plus the price of bulbs arent too* bad. You could always do one at a time over say a month till they are all new.
HTH!
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60 Gallon rimless, internal Herbie overflow, ATI Powermodule, Eheim 1250, 2X Tunze 6055, Tunze ATO, Euroreef RS100, Profilux controller, TLF Reactor. 
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#3
01-25-2008, 09:21 AM
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Those who sell T5's claims that white bulbs run 24 month blue/actinics are 18 month.
However if you read German forums they change every 6 month. So i guess 10-12 month is OK, say every Boxing Day. But these are only like $24 (in my case), so if one wants to change earlier to get most out of the bulb then sure why not?
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