I had 2 24' NO on my sump for a lnog time, never work very good. I then put my 2x55w PC on the tank and it grows caulerpa like crazy. I had 1 bulb die on me for a month or 2 and I still had good growth.
I guess, I would say more light the better. I have a been thinking for a long time to put my old 175 down there, but then I would just add more heat to the system
Lee
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Need more time for the tank... Break a leg!
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