You can use these steps to enable Night light on your device: If you're planning to burn the midnight oil this holiday season reading e-books, shopping online for the perfect gifts for your loved ones, or working late in front of your PC, use this guide to set up Night light to reduce eye strain and improve sleep quality. Mobile devices have had this feature for a while, but now it's available on your desktop, laptop, or tablet running the Windows 10 Creators Update and later. Night light is a feature that reduces the amount of blue light at night time, and it displays warmer colors that can help to reduce eye strain and help you fall asleep after staying up late working on your computer. VPN Deals: Lifetime license for $16, monthly plans at $1 & more