Thought you guys might find this cool and interesting. Here's some visible differences in brightness and color in zoas grown under T5, metal halide, and LED's. The one on the left is from a friends tank with metal halides(believe it's a 250), the one on the right was from my display tank with T5's(ATI bulbs), and the one on the bottom right had been in my frag tank under LED's(slimline S12 led) for a few months. Not the greatest pic but the differences are still pretty apparent.
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