Could the yellowing by light burn?

No, it is a nutrient issue.

That plant looks like it simply has a different phenotype with an early senescence pattern. In late flower it’s normal for some phenos to pull nitrogen and magnesium aggressively from fan leaves, especially in HF soil which runs hot early but fades later. Since the buds look healthy and the yellowing is uniform (not necrotic or spreading in patches), it’s not a deficiency you can ‘fix’ it’s genetic expression plus natural fade. Keep your feed stable and let it finish.

Hi sabre yeah I think a little bit more of nitrogen in veg would of slowed her autumn colours coming threw, apart from that they look nice and healthy.. Best of luck

No. Wrong position on the plant for lightburn and wrong optic for lightburn.

Looks like she is hungry, either because there arent enough nutrients or because she cant access them (lockout, wrong pH, something like that) Light burn is normally starting at the tallest buds and looks like you bleached the tips of your headbuds

What hindugod said

WOW LOOK AT DAT!! LACK OF REAL INFO IN DA DIARY!!! NO CLUE IF YOU ARE FEEDING SALT OR ORGANIC TYPE!!! CAN ONLY GO BY A FEW PICTURES!!! PLANT LOOKS LIKE IT HAD A LACK OF PROPER NUTRIENTS FOR A WHILE!!! WHEN YOU FLIP TO FLOWER STILL NEED SOME N AND START RAMPING UP DA P AND K!!!! LACK OF DA PROPER NUTRIENTS GAVE YOU DA EARLY FADE IN MY OPINION!!!!

hey 👋 Your pH is a bit too high; the free seed might not tolerate the medium as well. Other than that, I would give it more Calmag and check the nighttime temperature ; I have the impression that it’s feeling a bit cold