08-19-2012, 04:50 PM
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You have the same as I have over my 70g, 90g and even my 5-foot 115g tanks (2 T8 tubes each) and this is moderate light [contrary to the chart posted
]. A lot of aquarium plants will grow fine under this, assuming we are talking a "natural" or low-tech method. And as eug rightly mentioned, the species of plants have to match.
You can check the photos of my tanks under the "Aquariums" tab below my name on the left to see what I have achieved over 20 years with this lighting. I avoid light-demanding plants, which are most of the mini "carpet" substrate plants, and most stem plants.
One has to take with the proverbial grain of salt the usual light recommendations on plant forums and such. I can only assume these people are still thinking of the "good old days" of 20 years ago when T12 Grolux lighting was the norm for planted tanks, and that light was less intense than the T8 tubes in full spectrum we have now. And of course, most of these people also run CO2 and higher nutrient fertilization which has to be balanced by more light to be effective.