Too Long; Didn't Read
Circadian lighting—lighting that changes color to promote sleep at night and energy during the day—<a href="https://hackernoon.com/the-future-of-light-c8cf75394725" target="_blank">is the future</a>. There is <a href="https://hackernoon.com/whats-so-bad-about-blue-light-b04e13a801df" target="_blank">significant evidence</a> that blue light is necessary during the day and <a href="https://medium.com/@yeutterg/5-hacks-for-the-best-sleep-ever-50cd3079c546" target="_blank">undesirable at night</a>.