Yo StJames, honestly, at week 9 of flowering, you're right at the finish line, and looking at image.png, those buds are definitely bulking up nicely despite the hurdles you've faced with the pH and light intensity. Since you just did the sledgehammer flush this morning, you can expect the plant to start pulling the remaining mobile nutrients from the larger fan leaves, which might lead to some rapid yellowing or fading, but that’s totally normal during the final ripening stage. Keep a close eye on your trichomes now because that's your real indicator for harvest, especially after a lockout; you want to make sure you're seeing that perfect mix of milky and amber before you chop. Just maintain your environment as stable as possible for these last few days to avoid any late-stage rot or stress since your humidity was an issue before. You're almost there, so just stay patient and let her finish up her thing!
Happy Growing Growmie🌱