@triodug @coolboymew it is a hell of a lot more than a preference "Our brain’s chemistry and body-clock are affected by light and light stimulates hormones and neurotransmitters that greatly influence our overall feelings of well-being. Bright light exposure early in the day stimulates our body's production of serotonin (which improves mood and happiness) and regulates melatonin in the evening (which promotes sleep)." mess with evolution at your own peril!

https://verilux.com/pages/benefits-of-light-therapy