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=4

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/10.1177/0748730415585413 https://journals.sagepub.com/doi/pdf/10.1177/074873041558541...