I have tube lighting over my 55 gallon. Plant growth has been decent, but one of my bulbs broke in an accident a few months ago. Ever since, I have been using a 4100k cool white bulb and the other three are 6500k. Apart from the look that I'm not sure I'm so keen on, would I achieve greater growth by getting another 6500k bulb (which I will anyway for the look). Is it even worth having the 4100k bulb on the tank?
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