Your device's screen will adjust to the time of day using the Twilight app. After sunset, it filters the blue spectrum on your phone or tablet and shields your eyes with a gentle, pleasant red filter.
Reducing Blue Light on Your PC Screen
Are blue light glasses effective? - Mayo Clinic Health System
Blue light has a dark side - Harvard Health
How to Use a Blue Light Filter on Your PC or Mac
How to Use a Blue Light Filter on Your Phone
Fluorescent Light Covers Can Create a Safer Work Environment - Octo Lights - Fluorescent Light Covers
What is Blue Light from Digital Devices? Is it harmful for eyes?
Blue Light Filter iPhone: Optimize Your Screen for Better Sleep - GadgetMates
What happens to blue light when it passes through a yellow filter? - Quora
Where Does Blue Light Come From?
Blue Light: What Is It, and How Does It Affect Our Eyes?
Blue light – Ivins Night Sky
