Ppfd 850 30 days into flower
850 in flower is fine. The plant looks like it may have been short on light earlier in its life.
started this in a vgrow with a weaker light
In flower I run a max of 1000 PPFD, towards the end of the run I slowly start lowering the POFD to where I end up around 600 PPFD
Your light intensity doesn’t seem out of line but leaves are trying to shade is typical when light intensity is too high. This can happen with abrupt increases in light intensity even when it doesn’t seem unreasonably high.
You can combat by lowering light intensity some and then gradually increasing.