07-07-2011, 08:53 AM
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Originally Posted by deadhorrorfan
I see what you're saying. I'll pick up an All-Glass fixture from my LFS when I go to get the rest of the hardware next week and get the appropriate tubes. a 6700k and a 10000k should suffice I take it?
Why then was there all this buzz years ago (last time I set up a big planted tank) of WPG being the deciding factor in lighting?
That combo will work, I've had it and liked it.
When all we had were regular fluorescent tubes, watts per gallon had some degree of credibility. But as I explained earlier on, with different types of tubes this is not reliable because different tubes can emit different light intensity. In the Hagen "Glo" line alone you can get significant differences from weak Aqua-Glo, to Life-Glo that is twice the light intensity, to Power-Glo that is even more. yet all are the same wattage. Other things vary too, like spectrum and Kelvin so "watts" is not the sole issue.
Old habits die hard. I still read articles by reputable aquarists saying you can't even grow plants without 2-3 watts per gallon. Rubbish. I haven't been hallucinating that I have heavily-planted tanks with less than 1 watt per gallon for more than 20 years.