My tank is 36L x 24W x 26H
I used to have 1x250w + 2x24W T5
I could tell with a single point light source that the corals anywhere NOT directly under the bulb really had no growth or color on that shaded side. Adding another bulb has made a world of difference in growth and colour. Plus the crossover zone has even more light and those corals are definitely loving life.
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