I’m more concerning about the excessive light we continuously put outside our “caves”. Human evolved with day time/night time cycle. Face it, we’re currently in the progress of day time/not-so-dark night cycle evolution. It’s impossible to get back to the stone age. Let the science and technology slowly find the answer. In the meantime you can try your best to minimize the harmful effect (if there’s any) in sensible and practical ways.
I myself don’t have any problem sleeping/trying to sleep under any light source. The problem is when I wake up, CW hurts my eyes more than warm white.
[Clemence]