....

-just a food coma,
@blue!! ...oh, checked out the vid'-- my beef with this guy's method is that he's taking measurements directly from a dirty saucer!

-- already contaminated with residuals which concentrate there from repeated watering/drying,...
massive source of measurement error!
...
OG'-- ...is it the pic, or is there still some pale green to the scarred areas? Also, are the scarred areas actually thinner than surrounding normal leaf tissue? ..this isn't a defc. issue,...looks like physical damage, which would include possible lensing burn from water/nutrient droplets under strong HID/LED lighting, or,... any chance she was exposed to a cold draft? A rare phenomena associated with this called mesophyll cell collapse,.... as Blue suggested, get us a solid pH reading; sometimes sudden shifts in pH can cause similar symptoms, but that's usuallymore typical in hydro',.....