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Re: Replace fluorescent tubes every six months

One way to manage the decline in lumen output is to overlamp the tank. Turn
on one (or some) lamp(s) for the entire photoperiod, and then the extra
lamps for a short period at mid-day when they are new. Then extend the
period of the extra lamps as they all age. This way the total daily number
of lumens can be maintained. A meter would help here, but I'm just winging