Amber Neely, writing for AppleInsider:
Features like Apple’s Night Shift are designed to shift the light emitted from your devices away from the blue light spectrum. In addition to supposedly being better for your eyes, many device manufacturers also claim that this helps improve users’ sleep quality.
However, a new sleep study performed by Brigham Young University challenges that claim, showing that Night Shift and similar features don’t improve sleep quality or the hours of sleep an individual gets.
The study relied on a little bit of self reporting and only included 167 participants, it the results aren’t surprising to me. I’ve always felt like whole blue light claim was dubious.