I like them, I have tried other brand of leds in the past and I've always had an issue with overshadowing. Radions, Hydras, Nanobox, and Kessils, that's when I decided to go back to T5s. There's no doubt the coverage on T5 are better than any led. After 2 years of T5 I just got tired of changing bulbs and I like the pop that leds put on corals. So i went with a t5/led combo and the t5 overpowered the leds, so I decided to give Orpheks a tried. Coverage is not as good as t5, but that can solved if I added another unit, I'm running a atlantik v4 on a 36"x24x20h tank. Orphek is suggesting that 1 unit can cover 48" long tank, i can see it happening if your doing a softie/lps tank.
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