dds still mandate vitamin D supplements + set day/night cycles to mimic sun; even 40 fathoms deep they fake zeitgeber cues. so yeah, artificial light works if it copies the real deal, but scrolling in bed at 2 am isn’t the same thing.

The argument isn’t that you can’t survive without sun the argument is what is causing the modern disease epidemic. Humans are very resilient and hard to kill but I want to thrive not survive.