Blue light from screens has little effect on how quickly you fall asleep

There has been much discussion about how blue light from screens affects our sleep, but new research shows that the impact may be smaller than we thought. Sleep experts have found that blue light causes you to fall asleep on average less than three minutes later. This means that the idea that blue light significantly disrupts your sleep is largely incorrect. Although using technology just before bedtime is sometimes linked to poorer sleep, there are other factors that have more influence, such as what you watch and notifications that can wake you up.

People often use technology to keep themselves occupied or to feel better, which can also affect their sleep habits. It is important to know that it is not so much the blue light that affects your sleep, but more how and why you use technology. Through self-control and help from others, you can use technology wisely before bedtime so that it does not negatively affect your sleep.

David Delgado Vendrell

@jeroen and what about this 👇🏻

Jeroen Sangers

@daviddelven True, bright light (1,000-2,000 lux) inhibits melatonin. But device screens emit only about 80-100 lux. At the other end of the scale, natural sunlight on a sunny day provides about 100,000 lux. The article I linked to does a very good job explaining the bright light hypothesis.

Jeroen Sangers @jeroensangers