The light emitted by screens is a form of nourishment that can either harm or heal human biology depending on its spectrum.

“And this concept of light as nourishment or light as food is this double-edged sword. It's like light can really help us. sunlight and vitamin D and even actually some of the red light therapies are super effective. Yet blue light and EMF and other forms of particles and waves aka light can really h”

Screens that use pulse-width modulation for brightness control create flicker that is harmful to neurological and biological health.

“So you can't actually see it, but your iPhone screen is literally like turning on and off, on and off, on and off, and your brain can feel it.”