Arthur Goldstuck
Contributor
4 minute read
15 Jul 2022
2:05 pm

Prevent sleep disruption caused by blue light from computer screens

Arthur Goldstuck

Blue light wavelengths are beneficial during daylight hours because they boost attention and mood, but are the most disruptive at night.

Teenage girl reading text message with blue light from phone screen | Picture: iStock

The colour blue presents us with a deeply ironic contradiction: it is the world’s most common favourite colour and one that induces calm, yet it is one of the most harmful colours when emitted as light from computer and smartphone screens. According to Harvard Health Publishing, blue wavelengths are beneficial during daylight hours because they boost attention and mood, but are the most disruptive at night, due to their impact on the body’s production of melatonin, which helps induce sleep. “The proliferation of electronics with screens, as well as energy-efficient lighting, is increasing our exposure to blue wavelengths, especially after...