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Old 12-06-2012, 06:00 AM   #182
Fat Guy
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Originally Posted by ad3hybrid View Post
Is 15W enough for the plants? I've been aiming that bulb for my Archae 27W replacement bulb.
the bulb I'm using is 18w and for a 5.5gallon I think it's just right. my plants seem to be responding positively. And if you are a believe in wpg rule of thumb, that's about 3.27wpg compared to the former which was 4.9wpg. I think the reduction in intensity also provides a little more room for error. We shall see.
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