https://www.cnet.com/health/why-you-should-you-use-dark-mode-on-the-iphone/
The benefits of dark mode
Apple introduced
dark mode for Mac in 2018. At the time, creative professionals raved about the feature, as it's sleek and makes photos and text pop on the black background.
But aside from creative potential, the obvious benefit is that dark mode helps protects your eyes from the traditionally blinding whiteness of computer and phone screens.
Even with features like
Night Shift, which softens harsh blue light and
wearing blue-light blocking glasses, bright white tech screens can still cause blurry vision, headaches and watery eyes.
For many, dark mode may alleviate those symptoms. Reducing the amount of blue light you come into contact with throughout the day may also
help you sleep better.
Additionally, dark mode for iOS might increase your iPhone's battery life. It takes
less power for OLED screens to emit dark colors than a bright ones, so while Apple hasn't yet made any claims that Dark Mode saves battery, there's a good chance that it will give you more time before you need to plug in again.
However, this is only true for OLED screens (
organic light-emitting diode) and not LCD (liquid crystal display) screens. In OLED screens, every individual pixel lights up to create an image. So when you turn on Dark Mode, your phone just shuts off the pixels it doesn't need -- versus an LCD screen, which uses a backlight regardless of color scheme.
Only the newest iPhones use OLED, so this trick won't work for you if you use any model from the
8 Plus or earlier. More
iPhones with OLED screens are expected to come out next year.