EDMONTON -- If you have been making a concerted effort to improve your sleep by turning on your gadget’s blue light-reducing features, a new study may provide some much-needed insight into why you’re not seeing an improvement in your nightly shut eye. Researchers at Utah’s Brigham Young University conducted a study to see just how much of an impact blue light-reducing features, specifically Apple's Night Shift mode, have on users’ quality of sleep. Their conclusion? It has no impact at all. In fact, the research suggests blue light may not be enemy number 1 when it comes to sleep quality.