There are so many variables at play

These are low level experiments

None of them are blinded nor repeated on a large scale

There’s so many things you could justify with low level testing as such

How do you not know in the first study that it’s in fact green light that improves your circadian rhythm?

Also the fact people in the second study weren’t wearing glasses induces a placebo effect.

“The fact the levels of hormone were about the same” - what does that even mean? How is the hormone of a group measured ? Are they roughly the same age and if so, that doesn’t mean they’ve the same level of hormones

99% of research nowadays is incredibly poor. Researchers are incentivised to get valid results to get more funding…there’s never been a good study on blue light and I doubt it’s even possible to carry out in the world we live in today