Limited outdoor light exposure, characterized by 'dark days' and 'bright nights', is associated with higher mortality.

“the name of the the study was basically you know dark days and bright nights and and that is associated with higher mortality we know of course about Bright Nights not being good so not having a dark room to sleep in these are things that can impair melatonin that's associated with all all sorts of of bad things but the dark days was something that um we really had not seen and it was very interesting they actually could show by the hour that if you were having light coming in exactly what that did to your mortality and mortality went up dramatically”