Hmm, let’s see. For me, it works on most species of sps and definitely ok for lps if u placed them at the right places, (e.g. not too high to prevent getting bleached) but some doesn’t really like or maybe need better acclimatization to this led. Can see the difference from my old photos when using t5 & led. And it could be these species are more sensitive too. Namely, they are ssc & homewrecker and wd if u are wondering which ones. Hope it helps in clearing ur doubts.