The stock light in a biocube shouldn't kill an anemone. I think the biocube lights are too low to support nems. I could be wrong but that's what I've been reading a lot lately. I'm not sure that marineland light can support much either
Yep this is correct. Unless you have the 29 hqi the biocube original light isn't enough for a nem. How old is your tank? I'd pin the nems death on the lack of light and water quality not to much light. That marineland led is the biggest waste IMO. It can support softies and that's about It. And that's only if it's the reef capable one