The LED is in the left and fluorescent is in the left. I prefer the LED. Partly due to the awesome shimmery effect, but I find that the LED almost makes everything thing look sharper and more defines. Darker shadows and more natural looking color. The flourescent looks a lot softer, and it kinda makes water look hazy to me. And I have crystal clear water. It does make the fish,s color look good but so does the red bulb that I put in my LED fixture. I can also get a blue bulb for my LED which will even further pop my fish' color.
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