It’s a convenient scapegoat, but there are other reasons that devices mess with your sleep, reports Medium.
“Based on my research and that of others, we have consistently found that the blue-enriched light from screens tested in a single night in a sleep laboratory does not affect sleep,” says Michael Gradisar, a sleep researcher and professor of psychology at Flinders University in Australia. While he’s not ruling out the notion that blue light can repel sleep, Gradisar says it’s more likely that devices “indirectly” repel sleep by keeping people active and alert during times when they’d normally be winding down for bed.
