Vanha ketju, mutta olisi kai huomioitavaa valaistuksessa.

https://psychedelicreview.com/cultivating-p-cubensis-light-and-tryptophan-are-key-for-controlling-psilocybin-levels/
"data revealed that the levels of psilocybin and psilocin in the three groups of mushrooms were significantly different (p<0.001). The mushrooms grown in the dark had the highest levels of psilocybin and psilocin, while minimum levels were found in those grown in bright, indirect light."