Quote:
Originally Posted by ejawitz
I have a VIPARSPECTRA Timer Control 165W LED which has lots of power. it is about 1 foot above my 29 gallon tank. It seems like you are suggesting ramping up to 50%, but it seems to be plenty bright at 10% white and 10% blue. Could this be enough?
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If your 29g tank is the standard 18" deep, it's very unlikely that 10% on both channels will grow much but soft corals, and even that is doubtful. You can't trust your eyes, they are terrible at judging light intensity for a number of reasons.
Your 165 watt fixture is pretty common and lots of people run them. I have one over my 10" deep frag tank and I run it at 90% blue and 10% white. BTW, judging blue light intensity with your eyes is worthless. High PAR blue just doesn't look bright to human eyes. Our eyes are geared to see and judge green much better.