[zachruss92]

From my understanding from what experts say any light will affect your sleep to some extent. The big issue with backlit screens are that the blue lights are projected directly into your eyes which compounds the effects as more photons hit your eyes.

[mekkkkkk]

Is that true though? I was under the impression that two surfaces with the same perceived brightness would bombard your eyeballs with the same amount of photons. Regardless of whether or not the surface is emitting or reflecting light.

On the other hand, maybe there is some filtering taking place when light is bounced off materials. I.e. blue wavelengths being absorbed by the paper.

[bXVsbGVy]

This is both correct and wrong. Some lights affected more than others.

A paper[1] funded by NIH published this year showed that ~12 log photons cm⁻² s⁻¹ on λ=460nm is enough to suppress melantonin production.

I've discussed more on sibling thread.

[1] https://journals.sagepub.com/doi/pdf/10.1177/074873041558541...