"light brightness has nothing to do with myopia" - that's a big claim and will need some evidence to back it up, especially given the many studies that suggest otherwise.
This is still a topic with many unknowns, but we have to follow the evidence as much as we can. Evidence should always beat data-free guesses.
See my other replies. I also feel worried reading this, because it doesn't look like you've researched the subject, and I always worry about lack of understanding of myopia progression with people just talking about a subject they aren't familiar with.
This is still a topic with many unknowns, but we have to follow the evidence as much as we can. Evidence should always beat data-free guesses.