The big takeaway: It's not just light spectrum that can affect your sleep it's screen brightness as well. (At press time, Apple had yet to respond to our request for comment on the study.) But the study found 'no significant difference' between the effectiveness of the two Night Shift settings. (Melatonin is the naturally produced hormone the body releases to help you sleep.)Īlthough all three conditions 'significantly' suppressed melatonin, Night Shift suppressed it slightly less. The study looked at the amount of melatonin suppression resulting from three different iPad settings: Night Shift disabled, Night Shift set to Less Warm and Night Shift set to More Warm. on four separate nights under four different conditions. Researchers recruited 12 young adults to view iPads ( $310 at Amazon) between 11 p.m. The less blue light it emits, the better you'll sleep - theoretically. However, according to a new Light Research Center study on the effectiveness of Night Shift, your sleep may still be at risk.Īccessible by tapping Settings > Display & Brightness > Night Shift, the mode lets you 'shift the colors of your display to the warmer end of the color spectrum after dark.' The 'warmer' the screen, the less blue light it emits. The setting aims to minimize the adverse effects of the blue light emitted by your phone, tablet and computer.

That's why Apple introduced Night Shift back in iOS 9.3, then added it to Macs in 2017.

You probably know that excessive exposure to electronic screens before bed can disrupt your sleep.

Night Shift alone may not be helping you sleep.

Night shift mac book