Hey Rick-J,
The GSC was grown under a Cree Cob CXB 3590 fixture running 200 watts. I am using Advanced Nutrients and Bio-Biz light mix. I have grown lots of photosensitive plants, but this is only my 2nd auto. My suggestion to you would be to read thru the AutoBeast's tutorial "How to grow a perfectly healthy Auto...start to finish" its in the Guide and Tutorial section. I followed his tutorial to the letter start to finish and never had a single issue other than some sticky frosty bud, that dude (Auto Beast) knows his shit. Just follow his guide and you will be golden.