Battery life is one of the key criteria users consider when buying or reviewing mobiles. Google has now come out with the admission that using the dark mode or night mode does actually prolong battery life on Android phones or iPhones.
The reason for longer battery life with the dark mode lies in the pixels that make up the screen. In the dark mode, pixels do not have to shine brighter on several parts of the screen. Google demosntrated this with several colors during the recent Android Dev Summit.
The dark mode or theme is available on YouTube, and will soon be seen on the mobile Google feed and on its phone.