Harmful blue light is everywhere. It is indoors and outdoors, from both the sun & modern internal lighting (blue light emitted by the sun is why the sky appears blue).
In fact, the sun emits over 100x the intensity of harmful blue light than electronic devices and digital screens.
Outdoors, we’re exposed to high-intensity harmful blue light from the sun. (Squinting is our body’s natural defence against harsh light and bright glare.) Indoors, we’re exposed to harmful blue light from modern LED lighting our screens, LED displays and digital devices.