07-31-2011, 12:51 PM
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I concur with the suggestions, but others have not noticed something. I suspect you have T5 fixtures, since the 48-inch tubes are 54w and that means T5 HO fluorescent. This is way too much light. A couple options.
First, can you have just one of the tubes light by itself? Some fixtures will, some won't; if one tube is removed the other may not light. This would allow you to use just one tube, and one full spectrum (around 6500K) would work in T5 HO, but not two tubes.
Second, if you can find T5 NO tubes, they are approximately equal to the T8 (regular) tubes so two of them would be OK. T5 NO [=normal output, as opposed to HO which is high output] tubes are hard to find though, all the stores around me carry HO but no NO.
Third, another fixture, either a single T5 or a dual T8.