The blue light from our devices is really bad at night. Many downsides.
The day-night rythm of your body, sarcadian rythm of in correct, is really disturbed by it as well.
And food cravings come from your body not going into time to sleep mode from the blue light.
So, really good to hear that you’ve improved your health and are reading more. Books are still some of the best ways to learn about something.