here's a comparison of power usage (it's negligible): https://www.xda-developers.com/amoled-black-vs-gray-dark-mode/ https://www.xda-developers.com/amoled-black

here's a comparison of power usage (it's negligible): https://www.xda-developers.com/amoled-black-vs-gray-dark-mode/ https://www.xda-developers.com/amoled-black-vs-gray-dark-mod... The contrast is bad for your eyes, not the total amount of light, which your pupil can adjust for.