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Discussion Starter · #5 ·
Modest light fixture - 15 watt, 18". I have no meter, this is just my own perception. I can tell you that I can look directly at the tube when on, and it is not annoying. Before, it was too bright to tolerate. Areas of the tank once well lit are barely lit now.
 

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Discussion Starter · #7 ·
It was the tube, not the ballast. Significantly brighter, and this one is 6700K. Big difference in what everything looks like. Plants are considerably more green in appearance. Will be interesting to see if plant growth improves noticeably.
 
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